tidy sum vs haymow

tidy sum and haymow both are nouns.

Word	Noun	Adjective	Verb	Adverb
tidy sum	Yes	No	No	No
haymow	Yes	No	No	No

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

Other hyponyms of tidy sum include deluge, flood, inundation, torrent.

tidy sum (noun)	haymow (noun)
(often followed by `of') a large number or amount or extent	a loft in a barn where hay is stored
	a mass of hay piled up in a barn for preservation