laugh vs horselaugh

laugh and horselaugh both are nouns.

Word	Noun	Adjective	Verb	Adverb
laugh	Yes	No	Yes	No
horselaugh	Yes	No	No	No

As nouns, horselaugh is a hyponym of laugh; that is, horselaugh is a word with a more specific, narrower meaning than laugh:

laugh (noun)	horselaugh (noun)
the sound of laughing	a loud laugh that sounds like a horse neighing
a humorous anecdote or remark intended to provoke laughter
a facial expression characteristic of a person laughing

laugh (verb)	horselaugh (verb)
produce laughter