unclean vs impure

unclean and impure both are adjectives.

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

As adjectives, unclean and impure are synonyms defined as:

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

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