heighten vs subtilise

heighten and subtilise both are verbs.

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

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

Other hyponyms of heighten include subtilize.

heighten (verb)	subtilise (verb)
increase the level of	make (senses) more keen
become more extreme
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