The term 'At ___ Rate' is a phrase that is used to indicate that something will happen no matter what. The two crossword solutions for this phrase are ANY and PRIME. ANY is a three letter word that means 'no matter what' or 'regardless of'. PRIME is a five letter word that means 'of the highest quality or importance'. Therefore, the phrase 'At ANY Rate' means 'no matter what' and 'At PRIME Rate' means 'of the highest quality or importance'.