Happenings rhymes with:
openings, fastenings, openings, poisonings, questionings, seasonings, tightenings, bannings, beginnings, browning's, burnings, canings, corning's, drownings, earnings, earnings', evening's, evenings, fanning's, fastenings, hennings, innings, jennings, leanings, lightnings, linings, manning's, meanings, mining's, morning's, mornings, openings, pennings, poisonings, questionings, runnings, screenings, seasonings, signings, tightenings, underpinnings, vining's, warnings, winings, winnings, yearnings
Happenings sounds like:
haifong, happening, happens, 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