postiche vs garb

postiche and garb both are nouns.

Word	Noun	Adjective	Verb	Adverb
postiche	Yes	No	No	No
garb	Yes	No	Yes	No

As nouns, garb is a hypernym of postiche; that is, garb is a word with a broader meaning than postiche:

postiche: a covering or bunch of human or artificial hair used for disguise or adornment
garb: clothing of a distinctive style or for a particular occasion

Other hypernyms of postiche include attire, dress.

postiche (noun)	garb (noun)
something that is a counterfeit; not what it seems to be	clothing of a distinctive style or for a particular occasion
a covering or bunch of human or artificial hair used for disguise or adornment

postiche (verb)	garb (verb)
	provide with clothes or put clothes on