A word beginning with R for sleep is rest.
This could be dysfunctional, disadvantageous, disposable, dispensable, defunct, discarded, doomed, dead.
sleep
There are none. However, "ax" can be considered a synonym of sword, and the second letter is an x. There is also "excalibur."
move
recover
Another word for registered voters that begins with the letter C is constituents.
Unusual is another word for interesting.
annoying
atrocious
A four letter word for poverty is need.
Isle
eager
ligament
neat
Exert.
one is advocateannounce
deficient ???