The Collaborative International Dictionary of English v.0.48:

Accordance \Ac*cord"ance\, n. [OF. acordance.]
   Agreement; harmony; conformity. "In strict accordance with
   the law." --Macaulay.
   [1913 Webster]

   Syn: Harmony; unison; coincidence.
        [1913 Webster]

WordNet (r) 3.0 (2006):

accordance
    n 1: concurrence of opinion; "we are in accord with your
         proposal" [syn: accord, conformity, accordance]
    2: the act of granting rights; "the accordance to Canada of
       rights of access" [syn: accordance, accordance of rights]

Moby Thesaurus II by Grady Ward, 1.0:

244 Moby Thesaurus words for "accordance":
   acclamation, accommodation, accompaniment, accord, acquiescence,
   acquittal, acquittance, adaptation, adaption, adherence,
   adjustment, affinity, agape, agreement, agreement of all,
   alikeness, alliance, amity, analogy, aping, approach,
   approximation, assent, assimilation, association, attune,
   attunement, award, awarding, bestowal, bestowment,
   bonds of harmony, brotherly love, cahoots, calm, care, caritas,
   carrying out, cement of friendship, charity, chime, chiming,
   chorus, closeness, co-working, coaction, coherence, coincidence,
   collaboration, collectivity, collusion, combination,
   combined effort, common assent, common consent, communication,
   communion, community, community of interests, comparability,
   comparison, compatibility, compliance, concentus, concert,
   concerted action, concession, concomitance, concord, concordance,
   concourse, concurrence, conferment, conferral, confluence,
   conformance, conformation, conformation other-direction,
   conformity, congeniality, congruence, congruency, congruity,
   conjunction, consensus, consensus gentium, consensus of opinion,
   consensus omnium, consent, consentaneity, consilience, consistency,
   consonance, consonancy, consort, conspiracy, constancy, continuity,
   contribution, conventionality, cooperation, copying,
   correspondence, deliverance, delivery, diapason, discharge,
   donation, empathy, endowment, equability, equanimity, equilibrium,
   equivalence, esprit, esprit de corps, euphony, evenness, execution,
   feeling of identity, fellow feeling, fellowship, flexibility,
   frictionlessness, fulfillment, furnishment, general acclamation,
   general agreement, general consent, general voice, gifting, giving,
   good vibes, good vibrations, grant, granting, happy family,
   harmonics, harmony, heavy harmony, heed, heeding, homogeneity,
   homophony, identity, imitation, impartation, impartment,
   intersection, investiture, junction, keeping, kinship, liberality,
   like-mindedness, likeness, likening, line, love, malleability,
   meeting of minds, metaphor, mimicking, monochord, monody,
   monolithism, mutual understanding, mutuality, nearness, obedience,
   observance, observation, offer, one accord, one voice, oneness,
   orthodoxy, overlap, parallelism, parasitism, parity, peace,
   performance, persistence, pliancy, practice, presentation,
   presentment, provision, rapport, rapprochement, reciprocity,
   reconcilement, reconciliation, resemblance, respect, same mind,
   sameness, saprophytism, satisfaction, self-consistency, semblance,
   sharing, similarity, simile, similitude, simulation, simultaneity,
   single voice, solidarity, stability, steadfastness, steadiness,
   strictness, subscription, supplying, surrender, symbiosis,
   symmetry, sympathy, symphony, sync, synchronism, synchronization,
   synergy, tally, team spirit, three-part harmony, timing,
   total agreement, traditionalism, tune, unanimity, unanimousness,
   understanding, uniformity, union, unison, unisonance,
   united action, unity, universal agreement, unruffledness,
   vouchsafement