Sketchbooks rhymes with:
matchbooks, checkbooks, cookbook's, cookbooks, guidebooks, handbooks, jokebooks, matchbooks, notebooks, overbooks, passbooks, pocketbooks, schoolbooks, scrapbooks, storybooks, textbooks, waldenbooks, waldenbooks', yearbooks
Sketchbooks sounds like:
satisfies, shostakovich, sketchbook, stethoscopes, sweatshops