voider

noun

1

a hamper that holds dirty clothes to be washed or wet clothes to be dried

Synonym: clothes hamper laundry basket clothes basket

2

a piece of chain mail covering a place unprotected by armor plate

Synonym: gusset

3

a person who defecates

Synonym: defecator shitter

4

an official who can invalidate or nullify

my bank check was voided and I wanted to know who the invalidator was

Synonym: invalidator nullifier