Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun rarity

3 senses of rarity

Sense 1
rarity, rareness, infrequency -- (noteworthy scarcity)
       => scarcity, scarceness -- (a small and inadequate amount)

Sense 2
rarity, tenuity, low density -- (a rarified quality; "the tenuity of the upper atmosphere")
       => density, denseness -- (the amount per unit size)

Sense 3
curio, curiosity, oddity, oddment, peculiarity, rarity -- (something unusual -- perhaps worthy of collecting)
       => object, physical object -- (a tangible and visible entity; an entity that can cast a shadow; "it was full of rackets, balls and other objects")