impassioned vs fervent

impassioned and fervent both are adjectives.

Word	Noun	Adjective	Verb	Adverb
impassioned	No	Yes	No	No
fervent	No	Yes	No	No

As adjectives, impassioned and fervent are synonyms defined as:

Other synonyms of impassioned include ardent, fervid, fiery, perfervid, torrid.

impassioned (adjective)	fervent (adjective)
characterized by intense emotion	(archaic) extremely hot, burning, or glowing
	characterized by intense emotion