exception

[1]	exclusion , exclusion , elision , omission
[2]	debarment , blockage , lockout , shut-out
[3]	departure , anomaly , irregularity , special case , oddity , freak , rarity , peculiarity , quirk
[4]	take exception (to) , make/raise (an) objection (to/against) , object (to) , demur (at) , find fault (with) , take offence/umbrage (at) , be offended (at) , (call into) question , cavil , quibble , challenge , oppose , disagree (with)