Unscrambler and Scrabble Word Finder

1. metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated
2. a lever (as in a keyboard) that actuates a mechanism when depressed
3. the central building block at the top of an arch or vault
4. mechanical device used to wind another device that is driven by a spring (as a clock)
5. pitch of the voice
6. something crucial for explaining
7. a generic term for any device whose possession entitles the holder to a means of access
8. a list of words or phrases that explain symbols or abbreviations
9. a list of answers to a test
10. any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music
11. (basketball) a space (including the foul line) in front of the basket at each end of a basketball court; usually painted a different color from the rest of the court
12. a coral reef off the southern coast of Florida
13. United States lawyer and poet who wrote a poem after witnessing the British attack on Baltimore during the War of 1812; the poem was later set to music and entitled `The Star-Spangled Banner' (1779-1843)
14. a winged often one-seed indehiscent fruit as of the ash or elm or maple
15. a kilogram of a narcotic drug
16. harmonize with or adjust to
17. regulate the musical pitch of
18. identify as in botany or biology, for example
19. vandalize a car by scratching the sides with a key
20. provide with a key
21. serving as an essential component