intensify vs heighten

intensify and heighten both are verbs.

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

As verbs, intensify and heighten are synonyms defined as:

Other synonyms of intensify include compound, deepen.

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

Other hyponyms of intensify include heat up, hot up, screw up, fan, enhance, raise, amplify, sharpen, sharpen.

intensify (verb)	heighten (verb)
become more intense	increase the level of
make more intense, stronger, or more marked	become more extreme
increase in extent or intensity	make more extreme; raise in quantity, degree, or intensity
make the chemically affected part of (a negative) denser or more opaque in order produce a stronger contrast between light and dark	make more intense, stronger, or more marked
	make (one's senses) more acute
	increase the height of