empiricism vs investigating

empiricism and investigating both are nouns.

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

As nouns, investigating is a hypernym of empiricism; that is, investigating is a word with a broader meaning than empiricism:

empiricism: the application of empirical methods in any art or science
investigating: the work of inquiring into something thoroughly and systematically

Other hypernyms of empiricism include investigation.

empiricism (noun)	investigating (noun)
the application of empirical methods in any art or science	the work of inquiring into something thoroughly and systematically
medical practice and advice based on observation and experience in ignorance of scientific findings
(philosophy) the doctrine that knowledge derives from experience