rejective
abjuratory
abnegative
adversative
breakaway
contradicting
contradictory
contrary
creedless
denying
disaffirming
disallowing
disavowing
disbelieving
disclaiming
disowning
faithless
heretical
incredulous
irreligious
minimifidian
mugwumpian
mugwumpish
negative
negatory
nonbelieving
nullifidian
opposing
recanting
renunciative
renunciatory
repudiatory
repugnant
revocative
revocatory
schismatic
secessionist
separatist
unbelieving
unconfident
unconverted
unconvinced
without faith