conjugation vs category

conjugation and category both are nouns.

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

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

Other hypernyms of conjugation include class, family.

conjugation (noun)	category (noun)
the act of pairing a male and female for reproductive purposes	a general concept that marks divisions or coordinations in a conceptual scheme
the act of making or becoming a single unit	a collection of things sharing a common attribute
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