paean vs encomium

paean and encomium both are nouns.

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

As nouns, paean and encomium are synonyms defined as:

Other synonyms of paean include eulogy, panegyric, pean.

paean (noun)	encomium (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)