outfit vs mess kit

outfit and mess kit both are nouns.

Word	Noun	Adjective	Verb	Adverb
outfit	Yes	No	Yes	No
mess kit	Yes	No	No	No

As nouns, mess kit is a hyponym of outfit; that is, mess kit is a word with a more specific, narrower meaning than outfit:

outfit: gear consisting of a set of articles or tools for a specified purpose
mess kit: kit containing a metal dish and eating utensils; used by soldiers and campers

Other hyponyms of outfit include carpenter's kit, tool kit, first-aid kit, layette, sewing kit.

outfit (noun)	mess kit (noun)
gear consisting of a set of articles or tools for a specified purpose	kit containing a metal dish and eating utensils; used by soldiers and campers
a set of clothing (with accessories)
any cohesive unit such as a military company

outfit (verb)	mess kit (verb)
provide with (something) usually for a specific purpose