screwer

As nouns the difference between crewer and screwer

is that crewer is (informal) a member of a crew, as on a ship or spacecraft while screwer is somebody or something that screws.

As an adjective screwed

is (slang) beset with unfortunate circumstances that seem difficult or impossible to overcome; in imminent danger.

As a verb screwed

is (screw).

As a noun screwer is

somebody or something that screws.

As a noun screwer

is somebody or something that screws.

As an adjective screwier is

(screwy).