UPDATE: Listen, people who said a “noun is only a person place or thing”… you’re disproving your own argument. A laugh IS a thing. It’s the physical response from laughing. A comedian’s job is to get laughs. Merriam Webster wants a word with you people.

If the sentence is referring to the sound itself, which is a “thing” of sorts, you’ve got a noun.

Example: Her laugh was loud and snorty.

If in the sentence, someone or something is performing the act of laughing, you’ve got a verb on your hands.

Example: She can laugh and snort at the same time.

So, in response to your question, yes, and no.

I have a high-pitched laugh. I am describing someTHING…a laugh. Laugh is a noun in this sentence.

I laugh at your attempt. Laugh is the action in this sentence; therefore, used as verb.

Which phrase makes sense:

1. I ____…

2. My ____…

1. is for verbs, 2. is for nouns…if they both work the word can take both forms.

1. I laugh (at jokes). VERB

2. My laugh (is loud). NOUN

If you ARE doing this [laughing], it’s a verb, because you’re doing something; it’s a state of being.

However, if you’re talking sbou the SOUND OF THE LAUGH ITSELF, it’s a noun, because a sound is a thing.