variety vs multifariousness

variety and multifariousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
variety	Yes	No	No	No
multifariousness	Yes	No	No	No

As nouns, variety and multifariousness are synonyms defined as:

Other synonyms of variety include diverseness, diversity.

variety (noun)	multifariousness (noun)
noticeable heterogeneity	noticeable heterogeneity
a difference that is usually pleasant
a category of things distinguished by some common characteristic or quality
a show consisting of a series of short unrelated performances
(biology) a taxonomic category consisting of members of a species that differ from others of the same species in minor but heritable characteristics
a collection containing a variety of sorts of things