subtilize vs heighten

subtilize and heighten both are verbs.

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

As verbs, heighten is a hypernym of subtilize; that is, heighten is a word with a broader meaning than subtilize:

Other hypernyms of subtilize include sharpen.

subtilize (verb)	heighten (verb)
make more subtle or refined	increase the level of
make (senses) more keen	become more extreme
mark fine distinctions and subtleties, as among words	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