HBr(g) is called hydrogen bromide, while HBr(aq) is called hydrobromic acid, but I'm confused with naming?

H3PO4,when it is NOT dissolved in water. I know that H3PO4(aq) is phosphoric acid, but what do we called it when it is not an aqueous solution? For example, HPO4^2- is hydrogen phosphate and H2PO4^- is called dihydrogen phosphate, but what is the one I'm looking for called?