rankness vs prolificacy

rankness and prolificacy both are nouns.

Word	Noun	Adjective	Verb	Adverb
rankness	Yes	No	No	No
prolificacy	Yes	No	No	No

As nouns, rankness and prolificacy are synonyms defined as:

rankness and prolificacy: the property of producing abundantly and sustaining vigorous and luxuriant growth

Other synonyms of rankness include fertility, richness.

rankness (noun)	prolificacy (noun)
the attribute of having a strong offensive smell	the property of producing abundantly and sustaining vigorous and luxuriant growth
the property of producing abundantly and sustaining vigorous and luxuriant growth