Yes, lighter is a Scrabble word!

Verb

1. Transport in a flatbottom boat

Adjective

1. Of comparatively little physical weight or density

2. (used of color) having a relatively small amount of coloring agent

3. Of the military or industry; using (or being) relatively small or light arms or equipment

4. Not great in degree or quantity or number

5. Psychologically light; especially free from sadness or troubles

6. Characterized by or emitting light

7. (used of vowels or syllables) pronounced with little or no stress

8. Easily assimilated in the alimentary canal; not rich or heavily seasoned

9. (used of soil) loose and large-grained in consistency

10. (of sound or color) free from anything that dulls or dims

11. Moving easily and quickly; nimble

12. Demanding little effort; not burdensome

13. Of little intensity or power or force

14. (physics, chemistry) not having atomic weight greater than average

15. Weak and likely to lose consciousness

16. Very thin and insubstantial

17. Marked by temperance in indulgence

18. Less than the correct or legal or full amount often deliberately so

19. Having little importance

20. Intended primarily as entertainment; not serious or profound

21. Silly or trivial

22. Designed for ease of movement or to carry little weight

23. Having relatively few calories

24. (of sleep) easily disturbed

25. Casual and unrestrained in sexual behavior

Noun

1. A substance used to ignite or kindle a fire

2. A device for lighting or igniting fuel or charges or fires

3. A flatbottom boat for carrying heavy loads (especially on canals)