experimentation vs enquiry

experimentation and enquiry both are nouns.

Word	Noun	Adjective	Verb	Adverb
experimentation	Yes	No	No	No
enquiry	Yes	No	No	No

As nouns, enquiry is a hypernym of experimentation; that is, enquiry is a word with a broader meaning than experimentation:

Other hypernyms of experimentation include inquiry, research.

experimentation (noun)	enquiry (noun)
the act of conducting a controlled test or investigation	a systematic investigation of a matter of public interest
the testing of an idea	a search for knowledge
	an instance of questioning