| Word | Definitions | Synonyms |
|---|---|---|
| europium | (noun) a bivalent and trivalent metallic element of the rare earth group | Synonyms: atomic number 63, Eu |
| marsupium | (noun) an external abdominal pouch in most marsupials where newborn offspring are suckled | - |
| opium | (noun) an addictive narcotic extracted from seed capsules of the opium poppy | - |