Atom rhymes with:
chatham, datum, sense-datum, statum, stratum, tatom, accustom, ageratum, antemortem, arboretum, argosystem, 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, momentum, mortem, ottum, partum, phantom, quantum, rectum, sanctum, sense-datum, statum, stratum, subsystem, symptom, system, tatom, tatum, techsystem, telesystem, totem, ultimatum, ultrasystem, verbatim, victim, wintom
Atom sounds like:
adam, adame, adami, adamina, adamo, adan, addition, aden, adena, adenine, adham, adin, adina, adine, adman, admen, adnan, adney, adon, adonia, aetna, aidan, aithne, aiton, atamian, aten, athena, athenaeum, atheneum, athenian, aton, atone, attain, attune, auden, audino, audition, audwin, auten, autoimmune, auton, autonomy, autumn, aydin