hush
quiet
A four letter word starting with the letter a is able.
The word is still.
It depends on what you mean by 'four letter word'. Thea has four letters, so yes it is. It is not a swear word, so it's not that kind of 'four letter word'.
A four letter word for 'in addition to' is also.
hush
Quit! quadrant quiet quart quest
Quiet
quiet
quiet
purge, purse, quiet
hush-hush
quiet
A four letter word starting with the letter a is able.
A five letter word meaning peace is quiet or amity.
A 5-letter opposite for the word noisy is quiet,
quiet