WordNet (r) 3.0 (2006):

run on
    v 1: talk or narrate at length
    2: continue uninterrupted; "The disease will run on unchecked";
       "The party kept going until 4 A.M." [syn: run on, keep
       going]

Moby Thesaurus II by Grady Ward, 1.0:

127 Moby Thesaurus words for "run on":
   abide, advance, babble, be continuous, bide, blab, blabber,
   blather, blether, carry on, catenate, cease not, chain, chat,
   chatter, clack, clatter, concatenate, connect, connect up,
   continuate, continue, continue to be, defeat time, defy time,
   dither, drag on, drift along, dwell, elapse, endure, exist, expire,
   extend, flit, flow, flow on, fly, form a series, gab, gabble, gas,
   gibber, gibble-gabble, glide, go along, go by, go on, gossip, gush,
   haver, hold, hold on, hold out, hold steady, jabber, jaw, jog on,
   join, keep, keep going, keep on, lapse, last, last long, last out,
   linger, link, live, live on, live through, maintain,
   maintain continuity, march on, natter, never cease, palaver, pass,
   pass by, patter, perdure, perennate, persist, pour forth, prate,
   prattle, press on, prevail, proceed, ramble on, rattle, rattle on,
   reel off, remain, roll on, rub on, run, run its course, run out,
   slide, slip, slog on, spout, spout off, stagger on, stand, stay,
   stay on, string, string together, subsist, survive, sustain,
   talk away, talk nonsense, talk on, tarry, thread, tide over,
   tittle-tattle, twaddle, twattle, waffle, wear, wear well, yak,
   yakkety-yak