guard, patrol, escort

private (nongovernmental) management

vanguard (leading units of an army) / forward (player nearest to the opposing soccer team), lineman (playing position in football), or similar positions in tennis, volleyball, and other sports

(geometry) acute angle

electric ray

(geometry) construction, especially using tools such as ruler and compass

making an unnecessary addition

dotting the i's and crossing the t's

using sexual favors to improve business or one's standing

defense force