Synonyms and related words :
accompanying, adjacent, adjoining, agreeing, bordering, buck, coetaneous, coeternal, coeval, coexistent, coexisting, coinstantaneous, collateral, combat, concomitant, concurrent, connecting, contemporaneous, contemporary, contend, contiguous, coterminous, dispute, duel, end to end, endeavor, endways, endwise, face to face, fight, immediate, isochronal, isochronous, joined, juxtaposed, neighbor, neighboring, next, oppose, repel, rival, simultaneous, traverse, unison, unisonous, vie, withstand