coverall vs gaberdine

coverall and gaberdine both are nouns.

Word	Noun	Adjective	Verb	Adverb
coverall	Yes	No	No	No
gaberdine	Yes	No	No	No

As nouns, gaberdine is a hyponym of coverall; that is, gaberdine is a word with a more specific, narrower meaning than coverall:

coverall: a loose-fitting protective garment that is worn over other clothing
gaberdine: a loose coverall (coat or frock) reaching down to the ankles

Other hyponyms of coverall include dust coat, duster, gabardine, smock, jumper, boilers suit, boilersuit, overall.

coverall (noun)	gaberdine (noun)
a loose-fitting protective garment that is worn over other clothing	a loose coverall (coat or frock) reaching down to the ankles