yearling vs kid

yearling and kid both are nouns.

Word	Noun	Adjective	Verb	Adverb
yearling	Yes	No	No	No
kid	Yes	No	Yes	No

As nouns, kid is a hypernym of yearling; that is, kid is a word with a broader meaning than yearling:

Other hypernyms of yearling include child, fry, minor, nestling, nipper, shaver, small fry, tiddler, tike, tyke, youngster.

yearling (noun)	kid (noun)
an animal in its second year	young goat
a racehorse considered one year old until the second Jan. 1 following its birth	a young person of either sex
a young child who is just beginning to walk	a human offspring (son or daughter) of any age
	soft smooth leather from the hide of a young goat

yearling (verb)	kid (verb)
	be silly or tease one another
	tell false information to for fun