distill vs improve

distill and improve both are verbs.

Word	Noun	Adjective	Verb	Adverb
distill	No	No	Yes	No
improve	No	No	Yes	No

As verbs, improve is a hypernym of distill; that is, improve is a word with a broader meaning than distill:

distill: remove impurities from, increase the concentration of, and separate through the process of distillation
improve: to make better

Other hypernyms of distill include ameliorate, amend, better, meliorate.

distill (verb)	improve (verb)
give off (a liquid)	get better
undergo the process of distillation	to make better
extract by the process of distillation
remove impurities from, increase the concentration of, and separate through the process of distillation
undergo condensation; change from a gaseous to a liquid state and fall in drops