haymow vs mess

haymow and mess both are nouns.

Word	Noun	Adjective	Verb	Adverb
haymow	Yes	No	No	No
mess	Yes	No	Yes	No

As nouns, mess is a hypernym of haymow; that is, mess is a word with a broader meaning than haymow:

haymow (noun)	mess (noun)
a loft in a barn where hay is stored	a (large) military dining room where service personnel eat or relax
a mass of hay piled up in a barn for preservation	a meal eaten in a mess hall by service personnel
	soft semiliquid food
	(often followed by `of') a large number or amount or extent
	a state of confusion and disorderliness
	informal terms for a difficult situation

haymow (verb)	mess (verb)
	make a mess of or create disorder in
	eat in a mess hall