paper loss has no recorded synonym. 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. Its one recorded opposite is paper profit.
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.
an unrealized loss on an investment calculated by subtracting the current market price from the investor's cost
Synonyms, antonyms and the broader and narrower relations for paper loss come from Princeton University’s WordNet. Full sources and licences.