aroma vs incense

aroma and incense both are nouns.

Word	Noun	Adjective	Verb	Adverb
aroma	Yes	No	No	No
incense	Yes	No	Yes	No

As nouns, incense is a hyponym of aroma; that is, incense is a word with a more specific, narrower meaning than aroma:

aroma (noun)	incense (noun)
any property detected by the olfactory system	the pleasing scent produced when incense is burned
a distinctive odor that is pleasant	a substance that produces a fragrant odor when burned

aroma (verb)	incense (verb)
	make furious
	perfume especially with a censer