subtilise vs sharpen

subtilise and sharpen both are verbs.

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

As verbs, sharpen is a hypernym of subtilise; that is, sharpen is a word with a broader meaning than subtilise:

Other hypernyms of subtilise include heighten.

subtilise (verb)	sharpen (verb)
make (senses) more keen	become sharp or sharper
	make crisp or more crisp and precise
	raise the pitch of (musical notes)
	put (an image) into focus
	make (one's senses) more acute
	give a point to
	make sharp or sharper
	make (images or sounds) sharp or sharper