Adjectives, Nouns, and Verbs That Start With -ly

If you are looking for words that end with the suffix -ly, you have come to the right place. This guide covers adjectives, nouns, and verbs that end with -ly, explaining how each works in real sentences, emails, and everyday conversation. Many learners assume that all -ly words are adverbs, but that is not true. Some are adjectives (like friendly), some are nouns (like ally), and a few are verbs (like apply). This article gives you a clear, practical breakdown so you can use these words correctly and naturally.

Quick Answer: What Are -ly Words?

Words ending in -ly can be adjectives, nouns, or verbs. The most common group is adverbs (e.g., quickly, happily), but this article focuses on the other three parts of speech. Adjectives like lovely describe nouns. Nouns like ally name people or things. Verbs like rely show actions. The key is to check how the word is used in a sentence, not just its ending.

Adjectives Ending in -ly

Adjectives that end in -ly describe a person, place, or thing. They often come before a noun or after a linking verb like be, seem, or look. These adjectives are common in both formal and informal English.

Common -ly Adjectives

• Friendly – kind and pleasant
• Lovely – beautiful or enjoyable
• Lonely – feeling alone
• Deadly – causing death
• Costly – expensive
• Elderly – old (usually for people)
• Lively – full of energy
• Monthly – happening every month
• Daily – happening every day
• Weekly – happening every week

Formal vs. Informal Tone

Most -ly adjectives are neutral and work in both formal and informal settings. For example, friendly is fine in a business email or a casual chat. However, costly sounds more formal than expensive. Use costly in reports or serious discussions. Use lovely in friendly conversation, not in a formal contract.

Natural Examples

• The friendly waiter brought extra napkins. (informal, conversation)
• We had a lovely time at the park. (informal, conversation)
• The elderly couple walked slowly. (neutral, any context)
• This mistake was costly for the company. (formal, email or report)
• She felt lonely after her friend moved away. (informal, conversation)

Common Mistakes with -ly Adjectives

Mistake 1: Using an -ly adjective as an adverb.
Incorrect: He smiled friendly.
Correct: He smiled in a friendly way. Or: He gave a friendly smile.
Friendly is an adjective, not an adverb. You cannot use it to modify a verb directly.

Mistake 2: Confusing lonely with alone.
Alone means not with other people. Lonely means feeling sad because you are alone. You can be alone but not lonely.

Better Alternatives

If you want to sound more natural, try these alternatives for common -ly adjectives:

• Instead of costly, use expensive in everyday talk.
• Instead of elderly, use older in casual conversation.
• Instead of deadly, use dangerous unless you mean something that causes death.

Nouns Ending in -ly

Nouns that end in -ly are less common but still important. They name people, things, or concepts. Many of these nouns come from verbs or adjectives.

Common -ly Nouns

• Ally – a friend or partner
• Assembly – a group of people gathered together
• Family – a group of related people
• Fly – an insect (note: this is a noun, but the spelling is the same as the verb)
• July – the seventh month
• Supply – an amount of something available
• Reply – an answer
• Butterfly – an insect with colorful wings
• Belly – the stomach area
• Jelly – a soft, sweet food

Formal vs. Informal Tone

Most -ly nouns are neutral. Family and reply work everywhere. Ally is common in politics and business (formal). Belly and jelly are informal and used in everyday talk.

Natural Examples

• She sent a quick reply to the email. (neutral, email context)
• Our company needs a strong ally in the market. (formal, business)
• The family ate dinner together. (neutral, conversation)
• I love strawberry jelly on toast. (informal, conversation)
• The assembly will begin at 9 AM. (formal, announcement)

Common Mistakes with -ly Nouns

Mistake 1: Confusing ally with alley.
Ally is a person. Alley is a narrow street. They sound similar but are different.

Mistake 2: Using reply as a verb when you need a noun.
Incorrect: I need a reply to my question. (correct)
Incorrect: I need a reply to my question. (this is actually correct, but some learners use answer instead. Both are fine.)

Better Alternatives

• Instead of ally, use partner in casual business talk.
• Instead of assembly, use meeting for smaller groups.
• Instead of belly, use stomach in formal writing.

Verbs Ending in -ly

Verbs that end in -ly are not as common as adjectives or nouns, but they are used frequently. These verbs often have a base word that changes when you add -ly.

Common -ly Verbs

• Apply – to make a request or put something on
• Comply – to obey or follow rules
• Imply – to suggest without saying directly
• Reply – to answer
• Supply – to provide something
• Rely – to depend on someone or something
• Multiply – to increase in number
• Justify – to show that something is right
• Identify – to recognize or name
• Simplify – to make easier

Formal vs. Informal Tone

Most -ly verbs are neutral or formal. Apply, comply, imply, and justify are common in business and academic writing. Reply and supply are neutral. Simplify is used in both formal and informal contexts.

Natural Examples

• Please apply for the job online. (neutral, email or conversation)
• All employees must comply with safety rules. (formal, workplace)
• What did she imply by that comment? (neutral, conversation)
• I will reply to your message tomorrow. (neutral, email)
• You can rely on me for help. (informal, conversation)

Common Mistakes with -ly Verbs

Mistake 1: Confusing imply and infer.
Imply means to suggest. Infer means to understand a suggestion. The speaker implies; the listener infers.

Mistake 2: Using rely without on or upon.
Incorrect: I rely you.
Correct: I rely on you.

Mistake 3: Confusing apply (for a job) with apply (put on cream). Both are correct but have different meanings.

When to Use It

• Use apply for jobs, forms, or putting something on skin.
• Use comply in formal rules or instructions.
• Use imply when you want to be indirect.
• Use rely when you trust someone or something.
• Use simplify when you want to make something easier to understand.

Comparison Table: -ly Words by Part of Speech

Mini Practice: 4 Questions

Test yourself. Choose the correct word for each sentence.

1. She is a very ________ person. (friendly / friendlyly)
2. We need to ________ with the new rules. (comply / comply with)
3. He sent a quick ________ to the invitation. (reply / apply)
4. The ________ couple celebrated their anniversary. (elderly / elder)

Answers:

1. friendly
2. comply with
3. reply
4. elderly

FAQ: Words That End With -ly

1. Are all words ending in -ly adverbs?

No. Many words ending in -ly are adjectives (like friendly), nouns (like ally), or verbs (like apply). You need to look at how the word is used in a sentence to know its part of speech.

2. Can I use friendly as an adverb?

No. Friendly is only an adjective. To express the same idea as an adverb, use in a friendly way or in a friendly manner.

3. What is the difference between imply and infer?

Imply means to suggest something indirectly. Infer means to understand a suggestion. The speaker implies; the listener infers.

4. Is reply a noun or a verb?

Reply can be both a noun and a verb. As a verb: Please reply to my email. As a noun: I am waiting for a reply.

Final Tips for Using -ly Words

To use -ly words correctly, remember these three points:

• Check the part of speech. Not every -ly word is an adverb.
• Use adjectives like friendly and lovely to describe nouns, not verbs.
• For verbs like apply and rely, pay attention to prepositions (apply for, rely on).

For more word lists and explanations, visit our Parts of Speech Lists section. If you have questions, check our FAQ page or contact us.