express joy vs laugh

express joy is not a noun while laugh is a noun.

Word	Noun	Adjective	Verb	Adverb
express joy	No	No	Yes	No
laugh	Yes	No	Yes	No

As verbs, express joy and laugh are synonyms defined as:

Other synonyms of express joy include express mirth.

express joy (noun)	laugh (noun)
	the sound of laughing
	a humorous anecdote or remark intended to provoke laughter
	a facial expression characteristic of a person laughing

express joy (verb)	laugh (verb)
produce laughter	produce laughter