WordNet (r) 3.0 (2006):

connive at
    v 1: give one's silent approval to [syn: connive at, wink
         at]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "connive at":
   OK, accede to, accept, accord to, agree to, allow for, approve,
   approve of, assent, be blind to, be caught out, be inattentive,
   be unwary, be willing, bear, bear with, blink at, brook,
   condescend, condone, consent, consent to silently, countenance,
   deign, disregard, endorse, endure, give consent, give no heed,
   go along with, grant, have, have no objection, hear nothing,
   hear of, hold with, ignore, indulge, leave unavenged, let it go,
   let pass, make allowances for, make light of, miss, nod,
   nod assent, not attend, not heed, not listen, not notice,
   not refuse, okay, overlook, pass by, pass over, pay no attention,
   pay no mind, permit, pocket the affront, put up with, ratify,
   regard with indulgence, sanction, say aye, say yes, see nothing,
   slight, stand for, stomach, suffer, take, take kindly to,
   think little of, tolerate, vote affirmatively, vote aye, wink at,
   yield assent