coincidence (n.)
- accident
- accompaniment
- accord
- accordance
- affinity
- agreement
- alliance
- assent
- association
- chance
- chorus
- co-occurrence
- coaction
- coexistence
- coextension
- coherence
- collaboration
- collusion
- combination
- compatibility
- concert
- concomitance
- concord
- concordance
- concourse
- concurrence
- confluence
- conformance
- conformation
- conformity
- congeniality
- congruence
- congruity
- conjunction
- consistency
- consonance
- consort
- conspiracy
- contemporaneity
- contemporaneousness
- cooperation
- correspondence
- equality
- equivalence
- fluke
- fortuitousness
- fortuity
- happenstance
- harmony
- homogeneity
- identity
- indistinguishability
- intersection
- junction
- luck
- matching
- oneness
- overlap
- parallelism
- parasitism
- peace
- rapport
- sameness
- selfsameness
- simultaneity
- symbiosis
- symmetry
- sync
- synchronism
- synchronization
- synergy
- synonymity
- synonymousness
- synonymy
- tally
- timing
- togetherness
- uniformity
- union
- unison
- unity
A "strange coincidence," to use a phrase
By which such things are settled nowadays.