haymow vs garret

haymow and garret both are nouns.

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

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

haymow: a loft in a barn where hay is stored
garret: floor consisting of open space at the top of a house just below roof; often used for storage

Other hypernyms of haymow include attic, loft.

haymow (noun)	garret (noun)
a loft in a barn where hay is stored	floor consisting of open space at the top of a house just below roof; often used for storage
a mass of hay piled up in a barn for preservation