- lampoon: To humor or ridicule with irony or sarcasm
- largess: Generous giving (of money) to others who may seem inferior
- laudable: Deserving praise
- lax: Loose; lenient; negligent
- levity: Overly casual; a lack of seriousness or formality
- lexicon: A dictionary; a stock of terms relating to a certain subject or vocabulary
- libertarian: One who supports individual rights and free will
- libertine: A free thinker, usually used in a disparaging manner; one without any moral restraint
- licentious: Immoral; unrestrained by manners of society
- lilliputian: Very small
- limber: Flexible; able to be shaped
- lithe: Moving with the utmost grace; distinguished by effortless grace
- loquacious: Talkative