encomium vs kudos

encomium and kudos both are nouns.

Word	Noun	Adjective	Verb	Adverb
encomium	Yes	No	No	No
kudos	Yes	No	No	No

As nouns, kudos is a hypernym of encomium; that is, kudos is a word with a broader meaning than encomium:

Other hypernyms of encomium include congratulations, extolment, praise.

encomium (noun)	kudos (noun)
a formal expression of praise	an expression of approval and commendation