THESAURUS
affiliation, air line, apparentation, axis, beeline, birth, blood, bloodline, branch, breed, chord, common ancestry, consanguinity, derivation, descent, diagonal, diameter, directrix, distaff side, edge, extraction, family, female line, filiation, great-circle course, house, line, line of descent, lineage, male line, normal, perpendicular, phylum, race, radius, radius vector, right line, secant, seed, segment, sept, shortcut, side, spear side, spindle side, stem, stirps, stock, straight, straight course, straight line, straight stretch, straightaway, strain, streamline, succession, sword side, tangent, transversal, vector
ROGET THESAURUS
Straightness
N
straightness, rectilinearity, directness, inflexibility, straight line, right line,
direct line, short cut, 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.
