civilian garb vs clothing

civilian garb and clothing both are nouns.

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

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

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

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

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