We don't have synonyms for back pay yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are base pay, back bay and backpay.
(n) :
Pay received by an employee from an increase awarded retrospectively, and backdated.
(n) :
A withheld payment for work which has already been completed, or which could have been completed had the employee not been prevented from doing so.
(n) :
Pay received by an employee from an increase awarded retrospectively, and backdated.
(n) :
A withheld payment for work which has already been completed, or which could have been completed had the employee not been prevented from doing so.