archaicism vs off

archaicism is a noun but off is not a noun.

Word	Noun	Adjective	Verb	Adverb
archaicism	Yes	No	No	No
off	No	Yes	Yes	Yes

archaicism (noun)	off (noun)
the use of an archaic expression

archaicism (adjective)	off (adjective)
	not in operation or operational
	(of events) no longer planned or scheduled
	not performing or scheduled for duties
	in an unpalatable state
	below a satisfactory level

archaicism (verb)	off (verb)
	kill intentionally and with premeditation

archaicism (adverb)	off (adverb)
	at a distance in space or time
	from a particular thing or place or position (`forth' is obsolete)
	no longer on or in contact or attached