concurrency

1 the occurrence or existence of several things at once the concurrency of several life-threatening emergencies made for a busy night at the trauma center Synonyms coexistence, coincidence, concurrenceRelated Words development, happening, occurrence; coevality, contemporaneousness, simultaneousness, synchronism, synchronyNear Antonyms asynchrony (or asynchronism)

2 the state of being of one opinion about something there is general concurrency that the rule concerning the writing of thank-you notes still pertains Synonyms accord, concurrence, agreement, consensus, unanimity, unisonRelated Words accession, adhesion, assent, assentation, consent; acceptance, acquiescence, concession, embrace, embracement; approbation, approval, favor; alliance, collaboration, collusion, complicity, conspiracy; compliance, concert, concertedness, concord, concordance, conformity, consonance, harmony, oneness, solidarity, understanding, union; empathy, rapport, sympathyNear Antonyms discord, dissension (also dissention); dissent, opposition, resistance; disapprobation, disapproval, disfavorAntonyms conflict, disagreement, dissensus