Synonyms of rectilinear

1 Syllable
straight
2 Syllables
unbent, squared, squarish, straightest, boxy, boxier, straighter
3 Syllables
uncurled, foursquare, quadratic, boxlike, right-angled, collinear, quadrate
4 Syllables
rectangular, rectilineal, equal-sided, quadratical, orthogonal
5 Syllables
equilateral