biodiversity vs diversity

biodiversity and diversity both are nouns.

Word	Noun	Adjective	Verb	Adverb
biodiversity	Yes	No	No	No
diversity	Yes	No	No	No

As nouns, diversity is a hypernym of biodiversity; that is, diversity is a word with a broader meaning than biodiversity:

biodiversity: the diversity of plant and animal life in a particular habitat (or in the world as a whole)
diversity: noticeable heterogeneity

Other hypernyms of biodiversity include diverseness, multifariousness, variety.

biodiversity (noun)	diversity (noun)
the diversity of plant and animal life in a particular habitat (or in the world as a whole)	the condition or result of being changeable
	noticeable heterogeneity