heap vs haymow

heap and haymow both are nouns.

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

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

Other hyponyms of heap include deluge, flood, inundation, torrent.

heap (noun)	haymow (noun)
a car that is old and unreliable	a loft in a barn where hay is stored
a collection of objects laid on top of each other	a mass of hay piled up in a barn for preservation
(often followed by `of') a large number or amount or extent