monkey vs small fry

monkey and small fry both are nouns.

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

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

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

monkey (noun)	small fry (noun)
any of various long-tailed primates (excluding the prosimians)	someone who is small and insignificant
one who is playfully mischievous	a young person of either sex

monkey (verb)	small fry (verb)
do random, unplanned work or activities or spend time idly
play around with or alter or falsify, usually secretively or dishonestly