empiric vs empiricism

empiric is not a noun while empiricism is a noun.

Word	Noun	Adjective	Verb	Adverb
empiric	No	Yes	No	No
empiricism	Yes	No	No	No

empiric (noun)	empiricism (noun)
	the application of empirical methods in any art or science
	medical practice and advice based on observation and experience in ignorance of scientific findings
	(philosophy) the doctrine that knowledge derives from experience

empiric (adjective)	empiricism (adjective)
derived from experiment and observation rather than theory
relying on medical quackery