The Collaborative International Dictionary of English v.0.48:

Agree \A*gree"\, v. i. [imp. & p. p. Agreed; p. pr. & vb. n.
   Agreeing.] [F. agr['e]er to accept or receive kindly, fr.
   [`a] gr['e]; [`a] (L. ad) + gr['e] good will, consent,
   liking, fr. L. gratus pleasing, agreeable. See Grateful.]
   1. To harmonize in opinion, statement, or action; to be in
      unison or concord; to be or become united or consistent;
      to concur; as, all parties agree in the expediency of the
      law.
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            If music and sweet poetry agree.      --Shak.
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            Their witness agreed not together.    --Mark xiv.
                                                  56.
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            The more you agree together, the less hurt can your
            enemies do you.                       --Sir T.
                                                  Browne.
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   2. To yield assent; to accede; -- followed by to; as, to
      agree to an offer, or to opinion.
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   3. To make a stipulation by way of settling differences or
      determining a price; to exchange promises; to come to
      terms or to a common resolve; to promise.
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            Agree with thine adversary quickly.   --Matt. v. 25.
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            Didst not thou agree with me for a penny ? --Matt.
                                                  xx. 13.
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   4. To be conformable; to resemble; to coincide; to
      correspond; as, the picture does not agree with the
      original; the two scales agree exactly.
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   5. To suit or be adapted in its effects; to do well; as, the
      same food does not agree with every constitution.
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   6. (Gram.) To correspond in gender, number, case, or person.
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   Note: The auxiliary forms of to be are often employed with
         the participle agreed. "The jury were agreed."
         --Macaulay. "Can two walk together, except they be
         agreed ?" --Amos iii. 3. The principal intransitive
         uses were probably derived from the transitive verb
         used reflexively. "I agree me well to your desire."
         --Ld. Berners.
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   Syn: To assent; concur; consent; acquiesce; accede; engage;
        promise; stipulate; contract; bargain; correspond;
        harmonize; fit; tally; coincide; comport.
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The Collaborative International Dictionary of English v.0.48:

Agre \A*gre"\, Agree \A*gree"\, adv. [F. [`a] gr['e]. See
   Agree.]
   In good part; kindly. [Obs.] --Rom. of R.
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The Collaborative International Dictionary of English v.0.48:

Agree \A*gree"\, v. t.
   1. To make harmonious; to reconcile or make friends. [Obs.]
      --Spenser.
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   2. To admit, or come to one mind concerning; to settle; to
      arrange; as, to agree the fact; to agree differences.
      [Obs.]
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Moby Thesaurus II by Grady Ward, 1.0:

185 Moby Thesaurus words for "agree":
   abide by, accede, accede to, accept, acclaim, accompany, accord,
   acknowledge, acquiesce, acquiesce in, admit, agree in opinion,
   agree on, agree to, agree with, allow, answer to, applaud,
   approach, approve, approve of, assent, assent to, associate,
   assort with, bargain, bargain for, be agreeable to, be consistent,
   be dying to, be eager, be game, be in cahoots, be in phase,
   be in time, be of one, be open to, be ready, be spoiling for,
   be uniform with, be willing, buy, check, check out, cheer, chime,
   chime in with, close with, coact, coadunate, coexist, coextend,
   cohere, coincide, collaborate, collude, combine, come around to,
   come to terms, come together, compact, complete, comply, comport,
   concede, concert, concord, concur, conform, conform to,
   conform with, conjoin, connive, consent, consent to, consist,
   consist with, consort, conspire, contemporize, contract, cooperate,
   correspond, cotton to, covenant, ditto, do a deal, dovetail, echo,
   empathize, engage, equal, fall in together, fall in with, favor,
   fit in, fit together, fulfill, gee, get along, get along with,
   get on with, get together, give the nod, go, go along with,
   go together, go with, grant, hail, hang together, happen together,
   harmonize, harmonize with, hit, hold together, hold with,
   identify with, in toto, incline, interchange, interlock, intersect,
   isochronize, jibe, join, keep in step, keep pace with, lean, lock,
   look kindly upon, make a deal, march, match, meet, nod, nod assent,
   not hesitate to, overlap, own, parallel, plunge into, promise,
   quadrate, receive, reciprocate, recognize, reconcile, register,
   register with, respond to, rhyme, rival, round out, shake hands on,
   shake on it, side with, sing in chorus, sort with, square,
   square with, stand together, stipulate, strike a bargain,
   strike in with, subscribe, subscribe to, suit, supplement,
   sympathize, synchronize, synergize, take kindly to, tally, time,
   touch, understand one another, undertake, unite, vote for, welcome,
   would as leave, would as lief, yes, yield assent