(v. i.) To have secretly a joint part or share in an action; to play into each other's hands; to conspire; to act in concert.

OK accede to accept acceptance acclamation accommodate accommodate with accommodation accord to accordance acquiescence adapt adapt to adaptation adaption addition adjunct adjust adjust to adjustment administer admit affairs affiliation affinity affirmation affirmative affirmative voice afford agree agree in opinion agree to agree with agreement agreement of all alliance allot allow answer to approbation approval approve approve of approximation arrangement assemblage assent assimilate assimilate to associate association assonate assort with atone attune attunement award aye bargain be consistent be guided by be harmonious be in cahoots be in tune be of one be uniform with be willing bend bestow bestow on binding agreement blend blessing bond cartel cessation of combat check chime chime in with chiming chord chorus close with closeness coact coadunate cohere coherence coincide coincidence collaborate collective agreement collude combination combine common assent common consent communicate compact compatibility compliance comply comply with compose concentus concert concord concordance concur concurrence condescend confer conform conform to conform with conformance conformation conformation other-direction conformity congeniality congruence congruency congruity conjoin connectedness connection connivance connive connive at consensus consensus gentium consensus of opinion consensus omnium consent consent to silently consentaneity consist with consistency consonance consonancy consort consortium conspire contiguity contract contrariety convention conventionality cooperate cooperation coordinate correct correspond correspondence cotton to covenant covenant of salt cut to deal deal out dealings deduction deign diapason dicker discipline dish out disjunction dispense ditto dole dole out donate dovetail eagerness echo empathize employment contract endorse endorsement equalize equivalence euphony exemption from hostilities extend fall in together fall in with filiation fit fit together fix flexibility follow fork out formal agreement freedom from war gear to general acclamation general agreement general consent general voice get along get along with get on with gift gift with give give consent give freely give leave give out give permission give the go-ahead give the word go along with go by go together go with grant hand out hang together happen together harmonics harmonize harmonize with harmony have no objection heap heavy harmony help to hit hold together hold with homologate homologize homology homophony identify with impart interchange intercourse interlock intersect intersection intimacy ironclad agreement issue jibe join junction keeping key to lavish leave