yearling vs small fry

yearling and small fry both are nouns.

Word	Noun	Adjective	Verb	Adverb
yearling	Yes	No	No	No
small fry	Yes	No	No	No

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

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

yearling (noun)	small fry (noun)
an animal in its second year	someone who is small and insignificant
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