Daily word games to challenge your mind
For word games needing IUM suffixes, here's your 10-letter word resource. Popular examples include ANDROECIUM, APOTHECIUM, ASCOGONIUM, plus AUDITORIUM, CAFETORIUM, CINERARIUM and many more. Words ending in IUM often share similar meanings or grammatical forms.
| Word | Definition | Length | Syllables |
|---|---|---|---|
| androecium | 10 | 3 | |
| apothecium | 10 | 4 | |
| ascogonium | 10 | 4 | |
| auditorium | 10 | 4 | |
| cafetorium | 10 | 4 | |
| cinerarium | 10 | 4 | |
| colloquium | 10 | 3 | |
| compendium | 10 | 3 | |
| consortium | 10 | 3 | |
| delphinium | 10 | 3 | |
| dysprosium | 10 | 3 | |
| epicardium | 10 | 4 | |
| epineurium | 10 | 4 | |
| epithelium | 10 | 4 | |
| gadolinium | 10 | 4 | |
| glochidium | 10 | 3 | |
| haustorium | 10 | 3 | |
| honorarium | 10 | 4 | |
| hypanthium | 10 | 3 | |
| lawrencium | 10 | 3 | |
| lycopodium | 10 | 4 | |
| millennium | 10 | 3 | |
| miracidium | 10 | 4 | |
| moratorium | 10 | 4 | |
| myocardium | 10 | 3 | |
| nasturtium | 10 | 3 | |
| natatorium | 10 | 4 | |
| nephridium | 10 | 3 | |
| oceanarium | 10 | 4 | |
| ommatidium | 10 | 4 | |
| opprobrium | 10 | 3 | |
| osmeterium | 10 | 4 | |
| osmiridium | 10 | 4 | |
| pancratium | 10 | 3 | |
| paramecium | 10 | 4 | |
| parapodium | 10 | 4 | |
| perimysium | 10 | 4 | |
| phyllodium | 10 | 3 | |
| plasmodium | 10 | 3 | |
| polemonium | 10 | 4 | |
| praesidium | 10 | 3 | |
| primordium | 10 | 3 | |
| principium | 10 | 3 | |
| procambium | 10 | 3 | |
| promethium | 10 | 3 | |
| proscenium | 10 | 3 | |
| prostomium | 10 | 3 | |
| psalterium | 10 | 3 | |
| puerperium | 10 | 3 | |
| quadrivium | 10 | 3 | |
| sanatorium | 10 | 4 | |
| sanitarium | 10 | 4 | |
| sanitorium | 10 | 4 | |
| sclerotium | 10 | 3 | |
| seaborgium | 10 | 3 | |
| sestertium | 10 | 3 | |
| spermatium | 10 | 3 | |
| sporangium | 10 | 3 | |
| stramonium | 10 | 3 | |
| sudatorium | 10 | 4 | |
| technetium | 10 | 3 | |
| triclinium | 10 | 3 |
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.