Word Study
coterminous
CIDE DICTIONARY
coterminous, a. [Cf. Conterminous.].
Bordering; conterminous; -- followed by with. [1913 Webster]
OXFORD DICTIONARY
coterminous, adj. (often foll. by with) having the same boundaries or extent (in space, time, or meaning).
Etymology
CO- + TERMINUS + -OUS
THESAURUS
coterminous
accompanying, adjacent, adjoining, agreeing, bordering, coequal, coetaneous, coeternal, coeval, coexistent, coexisting, coextensive, coincident, coincidental, coinciding, coinstantaneous, collateral, concomitant, concurrent, congruent, connecting, contemporaneous, contemporary, conterminous, contiguous, correspondent, corresponding, end to end, endways, endwise, equal, equivalent, face to face, immediate, isochronal, isochronous, joined, juxtaposed, juxtapositional, juxtapositive, neighbor, neighboring, next, simultaneous, synonymous, unison, unisonousFor further exploring for "coterminous" in Webster Dictionary Online