Happens rhymes with:
aspen's, aspens, cheapens, coppens, deepens, lippens, opens, oppens, pippen's, reopens, saipan's, sharpens, tippens, weapon's, weapons, weapons', yaupons
Happens sounds like:
haifong, happening, happenings, happiness, havana's, havens, having, havins, heaping, heaven's, heavens, heaving, hibbing, hipbones, hobbing, hobbins, hoffman's, hoping, hopping, hovanec, hovhaness, hoving, huffines, huffing, hyping, hypnosis, hyponex