SG Heritage Dictionary

Synchronism Roget’s Thesaurus §120

N. synchronism, coexistence, coincidence, simultaneousness, simultaneity, concurrence, concomitance, unity of time, interim, isochronism, contemporary, coetanian

V. coexist, concur, accompany, go hand in hand, keep pace with, synchronize

Adj. synchronous, synchronal, synchronic, synchronical, synchronistical, simultaneous, coexisting, coincident, concomitant, concurrent, coeval, coevous, contemporary, contemporaneous, coetaneous, coeternal, isochronous

Adv. at the same time, simultaneously, together, in concert, during the same time, in the same breath, pari passu, in the interim, as one, at the very moment, just as, as soon as, meanwhile