Words That Rhyme With "Allantoidal" :
3 syllables:
centroidal, chancroidal, colloidal, conchoidal, cuboidal, cycloidal, deltoidal, dendroidal, discoidal, gyroidal, hypnoidal, mastoidal, mucoidal, rhizoidal, rhomboidal, sigmoidal, spheroidal, steroidal, thyroidal, toroidal
4 syllables:
adenoidal, alkaloidal, amyloidal, anthropoidal, asteroidal, autacoidal, bacteroidal, botryoidal, ellipsoidal, emulsoidal, solenoidal, trapezoidal