The Collaborative International Dictionary of English v.0.48:
Disagree \Dis`a*gree"\ (d[i^]s`[.a]*gr[=e]"), v. i. [imp. & p.
p. Disagreed (d[i^]s`[.a]*gr[=e]d"); p. pr. & vb. n.
Disagreeing.] [Pref. dis- + agree: cf. F. d['e]sagr['e]er
1. To fail to accord; not to agree; to lack harmony; to
differ; to be unlike; to be at variance.
They reject the plainest sense of Scripture, because
it seems to disagree with what they call reason.
2. To differ in opinion; to hold discordant views; to be at
controversy; to quarrel.
Who shall decide, when doctors disagree? --Pope.
3. To be unsuited; to have unfitness; as, medicine sometimes
disagrees with the patient; food often disagrees with the
stomach or the taste.
Note: Usually followed by with, sometimes by to, rarely by
from; as, I disagree to your proposal.
Syn: To differ; vary; dissent.
Moby Thesaurus II by Grady Ward, 1.0:
115 Moby Thesaurus words for "disagreeing":
alienated, antagonistic, antiestablishment, antipathetic, assorted,
at cross-purposes, at loggerheads, at odds, at odds with,
at variance, at variance with, at war, averse, breakaway, clashing,
colliding, conflicting, contradictory, contrary, contrasted,
contrasting, counter-culture, cranky, cross, cursory, departing,
deviating, deviative, different, differentiated, differing,
disaccordant, disagreeable, discordant, discrepant, discrete,
discriminated, disharmonious, disinclined, disjoined, disobedient,
disparate, disproportionate, dissentient, dissenting, dissident,
dissimilar, dissonant, distinct, distinguished, divergent,
diverging, divers, diverse, diversified, forced, fractious,
grating, heterogeneous, hostile, immiscible, in disagreement,
in opposition, inaccordant, incompatible, incongruous,
inconsistent, inconsonant, indisposed, indocile, inharmonious,
involuntary, irreconcilable, jangling, jarring, many, motley,
multifarious, mutinous, negative, nonconforming, opposed, opposing,
out of accord, out of whack, perfunctory, poles apart,
poles asunder, recalcitrant, recusant, refractory, repugnant,
resistant, sectarian, sectary, separate, separated, several, sulky,
sullen, unconformable, uncongenial, unconsenting, underground,
unequal, unharmonious, unlike, unwilling, variant, varied,
variegated, various, varying, widely apart, worlds apart