Roget's Thesaurus

#216. Parallelism

Nouns

parallelism; coextension; equidistance; similarity etc. 17.

Adjectives

parallel; coextensive; equidistant.

Adverbs

alongside etc. (laterally) 236.

#216a. Perpendicularity

Nouns

perpendicularity, orthogonality; verticality, etc. 212.

Verbs

be perpendicular, be orthogonal; intersect at right angles, be rectangular, be at right angles to, intersect at 90 degrees; have no correlation.

Adjectives

orthogonal, perpendicular; rectangular; uncorrelated.