impure vs unclean

impure and unclean both are adjectives.

Word	Noun	Adjective	Verb	Adverb
impure	No	Yes	No	No
unclean	No	Yes	No	No

As adjectives, impure and unclean are synonyms defined as:

impure and unclean: having a physical or moral blemish so as to make impure according to dietary or ceremonial laws

impure (adjective)	unclean (adjective)
(used of persons or behaviors) immoral or obscene	having a physical or moral blemish so as to make impure according to dietary or ceremonial laws
combined with extraneous elements	soiled or likely to soil with dirt or grime
having a physical or moral blemish so as to make impure according to dietary or ceremonial laws