cypher vs small fry

cypher and small fry both are nouns.

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

As nouns, small fry is a hyponym of cypher; that is, small fry is a word with a more specific, narrower meaning than cypher:

Other hyponyms of cypher include pip-squeak, squirt, jackanapes, lightweight, whippersnapper.

cypher (noun)	small fry (noun)
a secret method of writing	someone who is small and insignificant
a message written in a secret code	a young person of either sex
a person of no influence
a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential
a mathematical element that when added to another number yields the same number

cypher (verb)	small fry (verb)
make a mathematical calculation or computation
convert ordinary language into code