| A | B |
|---|
| Jagged | Rough, rugged, uneven, irregular |
| Jeopardy | Danger, hazard, risk, threat |
| Jolly | Joyful, happy, cheerful |
| Jolt | Shock, jar, shake up, surprise, blow, surprise, shock |
| Keen | Sharp, shrewd, clever, bright, eager, enthusiastic |
| Key | Crucial, important, critical |
| Knack | Skill, ability, aptitude, talent |
| Lack | Need, require, not have, shortage, absence, scarcity |
| Lag | Fall behind, go slowly |
| Lavish | Luxurious, plentiful, abundant |
| Lax | Careless, negligent, loose |
| Legendary | Mythical, fabled, famous |
| Legitimate | Proper, authentic, valid |
| Leisure | Free time, spare time, nonworking hours |
| Leisurely | Slow, relaxed |
| Lethargic | Slow, listless, sluggish, lazy |
| Liable | Legally responsible |
| Likely | Probable, plausible, credible |
| Linger | Remain, stay |
| Link | Join, connect, fasten, find, connection, tie |
| Long | Desire, wish for |
| Lucid | Clear, plain, understandable |
| Lucrative | Profitable, money-making |
| Lull | Soothe, calm, quiet, pause, break |
| Luminous | Bright, shining, glowing |
| Lure | Attract, tempt, entice |
| Lurid | Shocking, sensational, graphic |
| Lurk | Prowl, sneak, hide |
| Luster | Shine, radiance, brightness |
| Luxurious | Lavish, elegant, plush |
|
