rally vs banter

rally and banter both are nouns.

Word	Noun	Adjective	Verb	Adverb
rally	Yes	No	Yes	No
banter	Yes	No	Yes	No

As verbs, banter is a hyponym of rally; that is, banter is a word with a more specific, narrower meaning than rally:

Other hyponyms of rally include barrack, flout, gibe, jeer, scoff, chaff, jolly, josh, kid.

rally (noun)	banter (noun)
(sports) an unbroken sequence of several successive strokes	light teasing repartee
the feat of mustering strength for a renewed effort
an automobile race run over public roads
a large gathering of people intended to arouse enthusiasm
a marked recovery of strength or spirits during an illness

rally (verb)	banter (verb)
return to a former condition	be silly or tease one another
harass with persistent criticism or carping
call to arms; of military personnel
gather
gather or bring together