| Word | Definitions | Synonyms |
|---|---|---|
| gunmetal | (noun) a type of bronze used for parts subject to wear or corrosion (especially corrosion by sea water) | - |
| unmentionable | (noun) a garment worn under other garments | Synonyms: undergarment |
| unmercifulness | (noun) inhumaneness evidenced by an unwillingness to be kind or forgiving | Synonyms: mercilessness |