faithful vs trustworthy

faithful is a noun but trustworthy is not a noun.

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

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

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