tune-up vs readying

tune-up and readying both are nouns.

Word	Noun	Adjective	Verb	Adverb
tune-up	Yes	No	No	No
readying	Yes	No	No	No

As nouns, readying is a hypernym of tune-up; that is, readying is a word with a broader meaning than tune-up:

tune-up: exercising in preparation for strenuous activity
readying: the activity of putting or setting in order in advance of some act or purpose

Other hypernyms of tune-up include preparation.

tune-up (noun)	readying (noun)
adjustments made to an engine to improve its performance	the activity of putting or setting in order in advance of some act or purpose
exercising in preparation for strenuous activity