cashier's cheque vs cashier's check

cashier's cheque and cashier's check both are nouns.

Word	Noun	Adjective	Verb	Adverb
cashier's cheque	Yes	No	No	No
cashier's check	Yes	No	No	No

As nouns, cashier's cheque and cashier's check are synonyms defined as:

cashier's cheque and cashier's check: a check issued by the officer of a bank on the banks own account (not that of a private person)

Other synonyms of cashier's cheque include treasurer's check, treasurer's cheque.

cashier's cheque (noun)	cashier's check (noun)
a check issued by the officer of a bank on the banks own account (not that of a private person)	a check issued by the officer of a bank on the banks own account (not that of a private person)