| defier(noun, person, denial, negation) |
| refuser(noun, person, denial, negation) |
| nihilist(noun, person, denial, negation) |
| naysayer(noun, person, denial, negation) |
| contradictor(noun, person, denial, negation) |
| disclaimer(noun, person, denial, negation) |
| negator(noun, person, denial, negation) |
| rejector(noun, person, denial, negation) |
| repudiator(noun, person, denial, negation) |
| abdicator(noun, person, denial, negation) |
| arguer(noun, person, denial, negation) |
| contravener(noun, person, denial, negation) |
| controversialist(noun, person, denial, negation) |
| negativer(noun, person, denial, negation) |
| negativist(noun, person, denial, negation) |
| rejectionist(noun, person, denial, negation) |
| dissenter(noun, person, denial, negation) |
| negationist(noun, person, denial, negation) |
| refuter(noun, person, denial, negation) |
| renouncer(noun, person, denial, negation) |