tenuity vs rarity

tenuity and rarity both are nouns.

Word	Noun	Adjective	Verb	Adverb
tenuity	Yes	No	No	No
rarity	Yes	No	No	No

As nouns, tenuity and rarity are synonyms defined as:

Other synonyms of tenuity include low density.

tenuity (noun)	rarity (noun)
a rarified quality	something unusual -- perhaps worthy of collecting
the quality of lacking intensity or substance	a rarified quality
relatively small dimension through an object as opposed to its length or width	noteworthy scarcity