All Words: adenoidal, colloidal, amygdaloidal, alkaloidal, asteroidal, rhomboidal, zooidal, nonsteroidal, centroidal, botryoidal, spheroidal, cuboidal, trapezoidal, ellipsoidal, sinusoidal, amaroidal, cotyloidal, chancroidal, autacoidal, toroidal, bacterioidal, paraboloidal, discoidal, bacteroidal, anthropoidal, keloidal, sigmoidal, lithoidal, dendroidal, rhizoidal, cycloidal, hyperboloidal, amyloidal, thyroidal, steroidal, mastoidal, mucoidal, and homaloidal
| Word | Length | Vowels | Syllables | |||
|---|---|---|---|---|---|---|
| Adenoidal | 9 | 4 | 5 | 4 | ||
| Colloidal | 9 | 5 | 4 | 3 | ||
| Amygdaloidal | 12 | 7 | 5 | 5 | ||
| Alkaloidal | 10 | 5 | 5 | 4 | ||
| Asteroidal | 10 | 5 | 5 | 4 | ||
| Rhomboidal | 10 | 6 | 4 | 3 | ||
| Zooidal | 7 | 3 | 4 | 3 | ||
| Nonsteroidal | 12 | 7 | 5 | 4 | ||
| Centroidal | 10 | 6 | 4 | 3 | ||
| Botryoidal | 10 | 6 | 4 | 3 | ||
| Spheroidal | 10 | 6 | 4 | 3 | ||
| Cuboidal | 8 | 4 | 4 | 3 | ||
| Trapezoidal | 11 | 6 | 5 | 4 | ||
| Ellipsoidal | 11 | 6 | 5 | 4 | ||
| Sinusoidal | 10 | 5 | 5 | 4 | ||
| Amaroidal | 9 | 4 | 5 | 4 | ||
| Cotyloidal | 10 | 6 | 4 | 4 | ||
| Chancroidal | 11 | 7 | 4 | 3 | ||
| Autacoidal | 10 | 4 | 6 | 4 | ||
| Toroidal | 8 | 4 | 4 | 3 | ||
| Bacterioidal | 12 | 6 | 6 | 6 | ||
| Paraboloidal | 12 | 6 | 6 | 5 | ||
| Discoidal | 9 | 5 | 4 | 3 | ||
| Bacteroidal | 11 | 6 | 5 | 4 | ||
| Anthropoidal | 12 | 7 | 5 | 4 | ||
| Keloidal | 8 | 4 | 4 | 3 | ||
| Sigmoidal | 9 | 5 | 4 | 3 | ||
| Lithoidal | 9 | 5 | 4 | 3 | ||
| Dendroidal | 10 | 6 | 4 | 3 | ||
| Rhizoidal | 9 | 5 | 4 | 3 | ||
| Cycloidal | 9 | 6 | 3 | 3 | ||
| Hyperboloidal | 13 | 8 | 5 | 5 | ||
| Amyloidal | 9 | 5 | 4 | 4 | ||
| Thyroidal | 9 | 6 | 3 | 3 | ||
| Steroidal | 9 | 5 | 4 | 3 | ||
| Mastoidal | 9 | 5 | 4 | 3 | ||
| Mucoidal | 8 | 4 | 4 | 3 | ||
| Homaloidal | 10 | 5 | 5 | 4 | Ancient Greek |
Suffix: -oidal. List of words that end in oidal.

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