etymologize vs etymology

etymologize is not a noun while etymology is a noun.

Word	Noun	Adjective	Verb	Adverb
etymologize	No	No	Yes	No
etymology	Yes	No	No	No

etymologize (noun)	etymology (noun)
	the study of the sources and development of words
	a history of a word

etymologize (verb)	etymology (verb)
construct the history of words
give the etymology or derivation or suggest an etymology (for a word)