crow's feet vs laugh line

crow's feet and laugh line both are nouns.

Word	Noun	Adjective	Verb	Adverb
crow's feet	Yes	No	No	No
laugh line	Yes	No	No	No

As nouns, crow's feet and laugh line are synonyms defined as:

crow's feet and laugh line: a wrinkle in the skin at the outer corner of your eyes

Other synonyms of crow's feet include crow's foot.

crow's feet (noun)	laugh line (noun)
a wrinkle in the skin at the outer corner of your eyes	the point of a joke or humorous story
	a wrinkle in the skin at the outer corner of your eyes