Pneumo rhymes with:
mapfumo, sumo, zummo, abramo, adamo, alaimo, alamo, almo, amo, anselmo, anzelmo, asimow, balsamo, bellissimo, bellomo, bencomo, bergamo, bonomo, buonomo, caccamo, catalfamo, chemo, cimo, clemo, colosimo, como, cosmo, crisostomo, cuomo, dadamo, dalmo, degarmo, degiacomo, degirolamo, demo, deramo, derasmo, desormeaux, digeronimo, digiacomo, digirolamo, diguglielmo, elmo, eramo, giacomo, giaimo, girolamo, guglielmo, guillermo, haavelmo, hemo, herronimo, homo, imo, kairamo, lasmo, lemmo, limo, machismo, majordomo, mapfumo, marmo, nemo, nicodemo, nimmo, nishimo, nomo, olmo, palermo, palomo, paramo, perdomo, poveromo, premo, prestigiacomo, raimo, ramo, raymo, remo, renamo, romo, shomo, simo, sumatomo, sumitomo, sumo, talamo, tammo, thermo, turismo, zercomo, zummo
Pneumo sounds like:
p.m., pabon, paean, pain, paine, paino, pam, pammy, pan, panam, panama, panamanian, pane, panem, panini, pannone, pannu, panny, paone, papania, papin, papineau, papini, papon, pavon, pavone, pawn, pawnee, pay'n, payan, payin', payna, payne, peine, pen, pena, penh, penman, penn, penna, penney, pennie, penniman, pennino, penny, peon, peony, pepin, peppin, peyman, pham, phan, phen, phenom, phenomena, phenomenon, phinney, phippen, phnom, phone, phoneme, phoney, phony, piana, piano, pima, pimm, pin, pina, pine, pineau, pineo, pinho, pini, pinion, pinn, pinneo, pinney, pinnow, pino, piny, pinyan, pion, pippen, pippin, pm, pneumonia, poem, pom, poma, pomona, pon, pony, poon, popham, poppen, ppm, puffin, puma, pun, puny, pymm, pyne