wideness vs thickness

wideness and thickness both are nouns.

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

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

Other hyponyms of wideness include heaviness.

wideness (noun)	thickness (noun)
the property of being wide; having great width	the dimension through an object as opposed to its length or width
unusual largeness in size or extent or number	resistance to flow
	used of a line or mark
	indistinct articulation