Troughed is an uncommon word that means to form something into a trough or a long, narrow channel. Some synonyms for troughed include channeled, grooved, furrowed, ridged, incised, sculpted, carved, etched, gouged, and engraved. Channeled refers to something being formed into a channel or groove, while grooved and furrowed imply the creation of long, narrow depressions or ridges. Ridged suggests the formation of a series of ridges, and incised, sculpted, carved, etched, gouged, and engraved all imply the creation of fine, detailed lines or grooves through a cutting or carving process. Using synonyms can add variety and nuance to your writing, enhancing the reader's understanding and engagement.