category vs conjugation

category and conjugation both are nouns.

Word	Noun	Adjective	Verb	Adverb
category	Yes	No	No	No
conjugation	Yes	No	No	No

As nouns, conjugation is a hyponym of category; that is, conjugation is a word with a more specific, narrower meaning than category:

category (noun)	conjugation (noun)
a general concept that marks divisions or coordinations in a conceptual scheme	the act of pairing a male and female for reproductive purposes
a collection of things sharing a common attribute	the act of making or becoming a single unit
	a class of verbs having the same inflectional forms
	the complete set of inflected forms of a verb
	the inflection of verbs
	the state of being joined together