civilian garb vs habiliment

civilian garb and habiliment both are nouns.

Word	Noun	Adjective	Verb	Adverb
civilian garb	Yes	No	No	No
habiliment	Yes	No	No	No

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

civilian garb: ordinary clothing as distinguished from uniforms, work clothes, clerical garb, etc.
habiliment: a covering designed to be worn on a person's body

Other hypernyms of civilian garb include article of clothing, clothing, vesture, wear, wearable.

civilian garb (noun)	habiliment (noun)
ordinary clothing as distinguished from uniforms, work clothes, clerical garb, etc.	a covering designed to be worn on a person's body