wideness vs heaviness

wideness and heaviness both are nouns.

Word	Noun	Adjective	Verb	Adverb
wideness	Yes	No	No	No
heaviness	Yes	No	No	No

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

Other hyponyms of wideness include thickness.

wideness (noun)	heaviness (noun)
the property of being wide; having great width	the property of being comparatively great in weight
unusual largeness in size or extent or number	used of a line or mark
	unwelcome burdensome difficulty
	an oppressive quality that is laborious and solemn and lacks grace or fluency
	persisting sadness