| Word | Definitions | Synonyms |
|---|---|---|
| cycloolefin | (noun) alkene hydrocarbon which contains a closed ring of carbon atoms, but has no aromatic character. | Synonyms: cycloalkene |
| doleful | (adjective) filled with or evoking sadness | Synonyms: mournful |
| dolefully | (adverb) with sadness; in a sorrowful manner | Synonyms: sorrowfully |
| dolefulness | (noun) sadness caused by grief or affliction | - |
| olefin | (noun) any unsaturated aliphatic hydrocarbon | Synonyms: alkene, olefine |
| olefine | (noun) any unsaturated aliphatic hydrocarbon | Synonyms: alkene, olefin |