Here's what rhymes with spongioform.
form farm harm forme perform warm charm storm norm swarm disarm deform dorm overarm reform alarm inform forearm firearm nonfarm preform rearm underarm conform thunderstorm multiform outperform rewarm uniform transform lukewarm vermiform schoolmarm yardarm misinform chloroform cuneiform fusiform cruciform nonuniform Words that almost rhyme with spongioform
horn psalm thorn shorn born corn borne torn worn barn warn scorn sworn yarn morn mourn darn porn tarn lorn adorn forlorn forborne lowborn unborn reborn outworn forewarn forsworn timeworn unworn firstborn stillborn waterborne careworn lovelorn peppercorn foresworn sweetcorn unicorn homme vom som com calm bomb palm mom bom balm nom rom tom dom mam suam pom iamb quam prom qualm salaam becalm intercom aplomb pogrom embalm consomme firebomb supermom cardamom