Allusion rhymes with:
collusion, collusion, conclusion, delusion, disillusion, exclusion, illusion, inclusion, occlusion, preclusion, seclusion
Allusion sounds like:
alagem, alagna, alaskamen, alaskan, alcan, alchemy, alcina, alcon, aleichem, alexine, algamaa, algemene, algom, algoma, align, alison, alkema, alkene, alleghany, allegheny, allgemeine, allison, allyson, alzena, alzene, alzona