frock vs fit out

frock is a noun but fit out is not a noun.

Word	Noun	Adjective	Verb	Adverb
frock	Yes	No	Yes	No
fit out	No	No	Yes	No

As verbs, fit out is a hypernym of frock; that is, fit out is a word with a broader meaning than frock:

Other hypernyms of frock include apparel, clothe, dress, enclothe, garb, garment, habilitate, raiment, tog.

frock (noun)	fit out (noun)
a one-piece garment for a woman; has skirt and bodice
a habit worn by clerics
a long, loose outer garment

frock (verb)	fit out (verb)
put a frock on	provide with clothes or put clothes on
	provide with (something) usually for a specific purpose