invalidator

English Thesaurus

1. an official who can invalidate or nullify (noun.person)

hypernym	:	functionary, official,
definition	:	a worker who holds or is invested with an office (noun.person)

derivation	:	annul, avoid, invalidate, nullify, quash, void,
definition	:	declare invalid (verb.social)

derivation	:	annul, avoid, invalidate, nullify, quash, void,
definition	:	declare invalid (verb.social)