follow-on vs innings

follow-on and innings both are nouns.

Word	Noun	Adjective	Verb	Adverb
follow-on	Yes	No	No	No
innings	Yes	No	No	No

As nouns, innings is a hypernym of follow-on; that is, innings is a word with a broader meaning than follow-on:

follow-on: an immediate second innings forced on a cricket team scoring a prescribed number of runs fewer than its opponents in the first innings
innings: the batting turn of a cricket player or team

follow-on (noun)	innings (noun)
an immediate second innings forced on a cricket team scoring a prescribed number of runs fewer than its opponents in the first innings	the batting turn of a cricket player or team