Lightnings rhymes with:
bannings, beginnings, browning's, burnings, canings, corning's, drownings, earnings, earnings', evening's, evenings, fanning's, fastenings, happenings, hennings, innings, jennings, leanings, 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
Lightnings sounds like:
lactating, lasting, legitimacy, legitimize, legitimizes, lightening, lightens, lightheadedness, lighting, lighting's, lightness, lightning, liquidating, liquidations, listening, listens, listing, listings, locating, locations, lusitania's, lusitanias, lusting