trustworthy vs faithful

trustworthy is not a noun while faithful is a noun.

Word	Noun	Adjective	Verb	Adverb
trustworthy	No	Yes	No	No
faithful	Yes	Yes	No	No

trustworthy (noun)	faithful (noun)
	a group of people who adhere to a common faith and habitually attend a given church
	any loyal and steadfast following

trustworthy (adjective)	faithful (adjective)
worthy of trust or belief	steadfast in affection or allegiance
taking responsibility for one's conduct and obligations	not having sexual relations with anyone except your husband or wife, or your boyfriend or girlfriend
	marked by fidelity to an original