mickle vs inundation

mickle and inundation both are nouns.

Word	Noun	Adjective	Verb	Adverb
mickle	Yes	No	No	No
inundation	Yes	No	No	No

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

Other hyponyms of mickle include deluge, flood, torrent, haymow.

mickle (noun)	inundation (noun)
(often followed by `of') a large number or amount or extent	the rising of a body of water and its overflowing onto normally dry land
	an overwhelming number or amount