Daily word games to challenge your mind
A curated list of 8-letter words tailored to this exact pattern. Endings like IUM often mark word families—helpful to confirm tense or morphology. For example: actinium, aecidium, aerobium.
| Word | Definition | Length | Syllables |
|---|---|---|---|
| actinium | 8 | 3 | |
| aecidium | 8 | 3 | |
| aerobium | 8 | 3 | |
| allodium | 8 | 3 | |
| alluvium | 8 | 3 | |
| ammonium | 8 | 3 | |
| apterium | 8 | 3 | |
| aquarium | 8 | 3 | |
| ascidium | 8 | 3 | |
| basidium | 8 | 3 | |
| bdellium | 8 | 2 | |
| biennium | 8 | 2 | |
| bothrium | 8 | 2 | |
| brachium | 8 | 2 | |
| caladium | 8 | 3 | |
| chromium | 8 | 2 | |
| ciborium | 8 | 3 | |
| conidium | 8 | 3 | |
| coremium | 8 | 3 | |
| cymatium | 8 | 3 | |
| delirium | 8 | 3 | |
| didymium | 8 | 3 | |
| diluvium | 8 | 3 | |
| dominium | 8 | 3 | |
| emporium | 8 | 3 | |
| encomium | 8 | 3 | |
| eulogium | 8 | 3 | |
| europium | 8 | 3 | |
| exordium | 8 | 3 | |
| francium | 8 | 2 | |
| geranium | 8 | 3 | |
| gonidium | 8 | 3 | |
| gynecium | 8 | 3 | |
| hymenium | 8 | 3 | |
| illinium | 8 | 3 | |
| illuvium | 8 | 3 | |
| imperium | 8 | 3 | |
| indicium | 8 | 3 | |
| indusium | 8 | 3 | |
| lixivium | 8 | 3 | |
| lutecium | 8 | 3 | |
| lutetium | 8 | 3 | |
| masurium | 8 | 3 | |
| meconium | 8 | 3 | |
| mycelium | 8 | 3 | |
| nobelium | 8 | 3 | |
| oncidium | 8 | 3 | |
| oogonium | 8 | 3 | |
| patagium | 8 | 3 | |
| peculium | 8 | 3 | |
| peponium | 8 | 3 | |
| peridium | 8 | 3 | |
| polonium | 8 | 3 | |
| psyllium | 8 | 2 | |
| puparium | 8 | 3 | |
| pygidium | 8 | 3 | |
| pyxidium | 8 | 3 | |
| refugium | 8 | 3 | |
| rosarium | 8 | 3 | |
| rubidium | 8 | 3 | |
| samarium | 8 | 3 | |
| scandium | 8 | 2 | |
| scholium | 8 | 2 | |
| sedilium | 8 | 3 | |
| selenium | 8 | 3 | |
| silicium | 8 | 3 | |
| solarium | 8 | 3 | |
| solatium | 8 | 3 | |
| splenium | 8 | 2 | |
| sudarium | 8 | 3 | |
| syconium | 8 | 3 | |
| thallium | 8 | 2 | |
| titanium | 8 | 3 | |
| trillium | 8 | 2 | |
| vanadium | 8 | 3 | |
| velarium | 8 | 3 | |
| vivarium | 8 | 3 | |
| zooecium | 8 | 2 |
What’s typical about IUM-ending words?
IUM often marks suffix families; think about derivatives when guessing.
Do you include UK/US spellings?
Where they exist, both may appear.