postiche vs false hair

postiche and false hair both are nouns.

Word	Noun	Adjective	Verb	Adverb
postiche	Yes	No	No	No
false hair	Yes	No	No	No

As nouns, postiche and false hair are synonyms defined as:

postiche and false hair: a covering or bunch of human or artificial hair used for disguise or adornment

Other synonyms of postiche include hairpiece.

postiche (noun)	false hair (noun)
something that is a counterfeit; not what it seems to be	a covering or bunch of human or artificial hair used for disguise or adornment
a covering or bunch of human or artificial hair used for disguise or adornment