"Rough hews" is a term that refers to something that is not yet polished or refined. Synonyms for this phrase could include "unfinished," "coarse," or "unrefined." Other options might include "crude," "rough-cut," or "imperfect." The term might also be used to describe a rough outline or plan, in which case synonyms might include "draft," "sketch," or "preliminary." When something is rough hewn, it might be considered to be rugged or rustic, and related synonyms could include "earthy," "natural," or "uneven." The exact synonym used will likely depend on the context of the sentence in which it appears.