Sketchbook rhymes with:
matchbook, bankbook, checkbook, cookbook, guidebook, handbook, hornbook, jokebook, logbook, matchbook, notebook, omnibook, overbook, passbook, pocketbook, powerbook, redbook, rulebook, schoolbook, scrapbook, sourcebook, storybook, subnotebook, textbook, yearbook
Sketchbook sounds like:
satisfies, shostakovich, sketchbooks, stethoscopes, sweatshops