Momentum rhymes with:
centum, bantam, centum, frantom, phantom, quantum, wintom, accustom, ageratum, antemortem, arboretum, argosystem, atom, autumn, bantam, biosystem, bottom, cablesystem, centum, chatham, cheatham, cheatum, chittum, cottam, cottom, custom, datum, dictum, eastham, ecosystem, frantom, haltom, higginbottom, infinitum, item, kortum, lineitem, mentholatum, mortem, ottum, partum, phantom, quantum, rectum, sanctum, sense-datum, statum, stratum, subsystem, symptom, system, tatom, tatum, techsystem, telesystem, totem, ultimatum, ultrasystem, verbatim, victim, wintom
Momentum sounds like:
madam, madame, madan, maddamma, madden, maden, madman, madmen, madonia, madonna, madyun, mahatma, mahtan, maiden, maintain, manhattan, mantione, manton, matewan, mathan, mathena, matheney, matheny, matinee, mation, matney, mattina, matton, mattoon, mayden, maydena, mayton, meantime, medema, median, mediation, medimmune, medin, medina, meditation, medium, medwin, mendan, menhaden, menotomy, mention, menton, methadone, methane, metheney, metheny, metonomy, midthun, midtown, miedema, minatome, mindanao, minden, minton, minuteman, minutemen, mithun, mitman, mittan, mitten, mittman, mitton, modem, moden, modena, modine, monotone, monotony, montana, montanan, montano, montanye, montenay, montien, montini, montminy, montone, moten, mothon, motion, moton, motown, mountain, mouton, mundane, munden, munition, muntean, mutation, mutiny, mutton