WordNet sense 1 (a large gathering of people intended to arouse enthusiasm):

mass meeting

WordNet sense 2 (gather):

beat up, drum up

WordNet sense 3 (gather or bring together):

muster, summon, come up, muster up

WordNet sense 4 ((sports) an unbroken sequence of several successive strokes):

exchange

WordNet sense 5 (call to arms; of military personnel):

mobilize, mobilise, call up

WordNet sense 6 (harass with persistent criticism or carping):

bait, cod, rag, razz, ride, tantalize, taunt, tease, twit, tantalise

WordNet sense 7 (return to a former condition):

rebound, rebound

WordNet sense 8 (the feat of mustering strength for a renewed effort):

rallying