Synonyms of the word

rectilinear

• adj. In a straight line.
• adj. (geometry, art) Formed from straight lines.

linear

• adj. Having the form of a line; straight.
• adj. Of or relating to lines.
• adj. Made in a step-by-step, logical manner.
• adj. (botany, of leaves) Long and narrow, with nearly parallel sides.
• adj. (physics) A type of length measurement involving only one spatial dimension (as opposed to area or volume).

one-dimensional

• adj. Having length, but no width, height or depth.
• adj. (figuratively) Lacking depth or believability; flat.
• adj. (figuratively) Lacking personal depth and substance; conceited, vain, shallow, superficial (see also;…

rectilineal

• adj. Alternative form of rectilinear.