1. (n.) A compact, covenant, or agreement concerning anything.

2. (n.) An agreement made between the pope and a sovereign or government for the regulation of ecclesiastical matters with which both are concerned; as, the concordat between Pope Pius VII and Bonaparte in 1801.

Anschluss OK acceptance accession acclamation accommodation accompaniment accord accordance acquiescence adaptation adaption addition adjustment affiliation affinity affirmation affirmative affirmative voice agape agglomeration aggregation agreement agreement in principle agreement of all alikeness alliance amalgamation amity analogy aping approach approbation approval approximation arrangement assent assentation assimilation association aye bargain binding agreement blend blending blessing bond bonds of harmony brotherly love cabal cahoots caritas cartel cement of friendship centralization charity chime chorus closeness co-working coaction coalescence coalition coequality coetaneity coetaneousness coevalneity coevalness coexistence coincidence collaboration collective agreement collectivity collusion combination combine combined effort combo commitment common assent common consent communion community community of interests compact comparability comparison compatibility compliance composition concert concerted action concomitance concord concordance concordat concourse concurrence confederacy confederation confluence conformance conformation other-direction conformity congeniality congeries conglomeration congruence congruity conjugation conjunction connivance consensus consensus gentium consensus of opinion consensus omnium consent consentaneity consilience consistency consolidation consonance consortium conspiracy contemporaneity contemporaneousness contract convention conventionality cooperation copying correspondence covenant covenant of salt deal dicker eagerness ecumenism embodiment empathy employment contract encompassment endorsement engagement enosis entente equality equivalence esprit esprit de corps federalization federation feeling of identity fellow feeling fellowship flexibility formal agreement frictionlessness fusion general acclamation general agreement general consent general voice good vibes good vibrations happy family harmony hearty assent homogeneity homoousia hookup identity imitation inclusion incorporation indistinguishability integration ironclad agreement junta keeping kinship league legal agreement legal contract like-mindedness likeness likening line love malleability marriage meeting of minds meld melding merger metaphor mimicking mutual agreement mutual understanding mutuality nearness no difference obedience obligation observance okay one accord one voice oneness orthodoxy package package deal pact paction parallelism parasitism parity peace permission pliancy preengagement promise promptitude promptness protocol rapport rapprochement ratification readiness reciprocity recognizance reconcilement reconciliation resemblance same mind sameness sanction saprophytism self-identity selfhood selfness selfsameness semblance settlement sharing similarity simile similitude simulation simultaneity single voice solidarity solidification stipulation