elevate vs heighten

elevate and heighten both are verbs.

Word	Noun	Adjective	Verb	Adverb
elevate	No	No	Yes	No
heighten	No	No	Yes	No

As verbs, heighten is a hyponym of elevate; that is, heighten is a word with a more specific, narrower meaning than elevate:

elevate (verb)	heighten (verb)
raise in rank or condition	increase the level of
raise from a lower to a higher position	become more extreme
give a promotion to or assign to a higher position	make more extreme; raise in quantity, degree, or intensity
	make more intense, stronger, or more marked
	make (one's senses) more acute
	increase the height of