Having an extensive vocabulary can add depth to writing and conversation. In reference to a remaining quantity, a few synonyms for "remaindered portion" include surplus, leftover, excess, residual, or remaining stock. These words imply that there is an abundance of something left over after the primary use or need has been fulfilled, without suggesting waste or disregard. These synonyms can be useful in various contexts, from discussing surplus inventory or food supplies to exploring poetic imagery. These synonyms present an opportunity to express oneself with more nuance and precision, ultimately adding to the richness of our language.