suspicious vs suspect

suspicious is not a noun while suspect is a noun.

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

As adjectives, suspicious and suspect are synonyms defined as:

Other synonyms of suspicious include fishy, funny, shady.

suspicious (noun)	suspect (noun)
	someone who is under suspicion
	a person or institution against whom an action is brought in a court of law; the person being sued or accused

suspicious (adjective)	suspect (adjective)
openly distrustful and unwilling to confide	not as expected
not as expected

suspicious (verb)	suspect (verb)
	regard as untrustworthy; regard with suspicion; have no faith or confidence in
	imagine to be the case or true or probable
	hold in suspicion; believe to be guilty