N. straightness, rectilinearity, directness, inflexibility, straight line, right line, direct line, short cut

V. be straight, have no turning, not incline to either side, not bend to either side, not turn to either side, not deviate to either side, go straight, steer for, render straight, straighten, rectify, set straight, put straight, unbend, unfold, uncurl, unravel, unwrap

Adj. straight, rectilinear, rectilineal, direct, even, right, true, in a line, unbent, virgate, undeviating, unturned, undistorted, unswerving, straight as an arrow, inflexible, laser-straight, ramrod-straight