Swarmed rhymes with:
warmed, conformed, deformed, formed, informed, malformed, misinformed, performed, reformed, stormed, transformed, unformed, uninformed, warmed
Swarmed sounds like:
sacrament, sacramento, sarant, sarmento, sarmiento, schrandt, scorned, screamed, screened, serenade, serenaded, serenity, serranto, shoehorned, sorento, sorrenti, surmount, surmounted, surround, surrounded