var. vs taxonomic category

var. and taxonomic category both are nouns.

Word	Noun	Adjective	Verb	Adverb
var.	Yes	No	No	No
taxonomic category	Yes	No	No	No

As nouns, taxonomic category is a hypernym of var.; that is, taxonomic category is a word with a broader meaning than var.:

var.: (biology) a group of organisms within a species that differ in trivial ways from similar groups
taxonomic category: animal or plant group having natural relations

Other hypernyms of var. include taxon, taxonomic group.

var. (noun)	taxonomic category (noun)
(biology) a group of organisms within a species that differ in trivial ways from similar groups	animal or plant group having natural relations