Common:
* Large
* Little
* Long
* Late
* Lovely
* Lucky
* Loud
* Lazy
* Light
* Live
Less Common:
* Luminous
* Luscious
* Lucid
* Lanky
* Lofty
* Luminous
* Lush
* Lethargic
* Linear
* Legal
More descriptive:
* Languid
* Lacerating
* Luminous
* Luminous
* Laconic
* Luminous
* Luminous
* Luminous
* Luminous
* Luminous
Feel free to ask for more specific types of adjectives, like those describing colors, emotions, or objects!