compensating balance has 1 distinct synonym spread across 1 of its 1 sense. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
a minimum credit balance that a bank may require a borrower to keep on deposit as a condition for granting a loan; a common requirement for establishing a line of credit at a bank
“the compensating balance increases the effective interest rate to the bank since the net amount loaned is reduced but the interest paid is unchanged”
Synonyms, antonyms and the broader and narrower relations for compensating balance come from Princeton University’s WordNet. Full sources and licences.