n. 25B6; noun photographs stuck down with gum : GLUE, adhesive, fixative, paste, epoxy resin; N. Amer. mucilage.
25B6; verb the receipts were gummed into a book : STICK, glue, paste; fix, affix, attach, fasten.
25A0; gum something up CLOG (UP), choke (up), stop up, plug; obstruct; informal bung up; Brit. informal gunge up; technical occlude.