Coetaneous(a.) of the same age; beginning to exact the same time; contemporaneous.
Thesaurus Entries
accessory, accidental, accordant, ado, afloat, afoot, agreeing, associate, associated, at one with, attendant, attending, circumstantial, coacting, coactive, coadunate, coetaneous, coeternal, coeval, coexistent, coexisting, coincident, coinstantaneous, collaborative, collateral, collective, collusive, combined, combining, concerted, concomitant, concordant, concurrent, concurring, conjoint, consilient, conspiratorial, contemporaneous, contemporary, conterminous, cooperant, cooperative, coordinate, correlative, coterminous, coupled, coworking, current, doing, eventuating, fellow, going on, happening, harmonious, in hand, in the wind, incidental, isochronal, isochronous, joined, joint, meeting, mutual, occasional, occurring, on, on foot, ongoing, paired, parallel, parasitic, passing, prevailing, prevalent, resultant, saprophytic, simultaneous, symbiotic, synchronous, synergetic, synergic, synergistic, taking place, twin, under way, unison, unisonous, united, uniting