Submarines are getting quieter, stealthier, and better armed.
Wandering freshmen from the Yale campus frequently mistook it for the home office of one of the stealthier secret societies.
His movements as he crossed the floor were stealthier than those which still persisted in the bedroom.
He winced once to see his own shadow with its stealthier movement.
Her caution seemed to be justified a moment later, for a heavier but stealthier footstep halted outside.