suspicious vs fishy

suspicious and fishy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
suspicious	No	Yes	No	No
fishy	No	Yes	No	No

As adjectives, suspicious and fishy are synonyms defined as:

Other synonyms of suspicious include funny, shady, suspect.

suspicious (adjective)	fishy (adjective)
openly distrustful and unwilling to confide	of or relating to or resembling fish
not as expected	not as expected