Outgo rhymes with:
amigo, archipelago, bargo, belgo, bongo, cargo, chicago, fandango, fargo, genego, gogo, hidalgo, indigo, lumbago, papago, pogo, seago, sego, shawgo, vertigo, vidigo, wargo
Outgo sounds like:
oates, oaths, oatis, oats, odaiko, oddities, odds, odes, odessa, odetics, odious, odysseus, odyssey, odyssey's, otis, otsego, otsuka, ottawa's, ottaway's, otto's, otts, out's, outage, outages, outdoes, outguess, outguesses, outhouse, outhouses, outs, outsize, outtake, outtakes, outweigh, outweighs, outwits, owades