proximate vs ultimate

proximate is not a noun while ultimate is a noun.

Word	Noun	Adjective	Verb	Adverb
proximate	No	Yes	No	No
ultimate	Yes	Yes	No	No

proximate (noun)	ultimate (noun)
	the finest or most superior quality of its kind

proximate (adjective)	ultimate (adjective)
closest in degree or order (space or time) especially in a chain of causes and effects	furthest or highest in degree or order; utmost or extreme
very close in space or time	being the last or concluding element of a series