encomium vs paean

encomium and paean both are nouns.

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

As nouns, encomium and paean are synonyms defined as:

Other synonyms of encomium include eulogy, panegyric, pean.

encomium (noun)	paean (noun)
a formal expression of praise	a formal expression of praise
	(ancient Greece) a hymn of praise (especially one sung in ancient Greece to invoke or thank a deity)