From The Collaborative International Dictionary of English v.0.44 [gcide]:
Synchronism \Syn"chro*nism\, noun [Gr. ?, fr. ? to be contemporary with, from ? synchronous. See {Synchronous}.]
1. The concurrence of events in time; simultaneousness.
2. The tabular arrangement of historical events and personages, according to their dates.
3. (Paint.) A representation, in the same picture, of two or events which occured at different times.
From WordNet (r) 2.0 [wn]:
noun
1: the relation that exists when things occur at the same time; "the drug produces an increased synchrony of the brain waves" [syn: {synchrony}, {synchronicity}, {synchroneity}, {synchronization}, {synchronisation}, {synchronizing}] [ant: {asynchronism}, {asynchronism}, {asynchronism}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
96 Moby Thesaurus words for "synchronism": accompaniment, accord, accordance, affinity, agreement, alliance, assent, association, attune, attunement, cahoots, chime, chiming, chorus, co-occurrence, co-working, coaction, coetaneity, coetaneousness, coevalneity, coevalness, coexistence, coherence, coincidence, collaboration, collectivity, collusion, combination, combined effort, compatibility, concentus, concert, concerted action, concomitance, concomitancy, concord, concordance, concourse, concurrence, confluence, conformance, conformation, conformity, congeniality, congruence, congruency, congruity, conjunction, consilience, consistency, consonance, consonancy, consort, conspiracy, contemporaneity, contemporaneousness, cooperation, correspondence, diapason, equivalence, euphony, harmonics, harmony, heavy harmony, homophony, intersection, isochronism, junction, monochord, monody, oneness, overlap, parallelism, parasitism, peace, rapport, saprophytism, self-consistency, simultaneity, symbiosis, symmetry, symphony, sync, synchronization, synergy, tally, three-part harmony, timing, togetherness, tune, uniformity, union, unison, unisonance, united action, withness
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