| Word | Definitions | Synonyms |
|---|---|---|
| lethal | (adjective) of an instrument of certain death | Synonyms: deadly |
| lethargic | (adjective) deficient in alertness or activity | Synonyms: unenergetic |
| lettered | (adjective) highly educated; having extensive information or understanding | Synonyms: knowing, knowledgeable, learned, well-educated, well-read |