Recommended by Yuuk-chan
"ADVICE" and "ADVISE"
"Advice" is a noun. "Advise" is a verb. Ex.: His advice was invaluable. Can you advise me on this issue?
"CANVAS" and "CANVASS"
"Canvas" is a type of strong, heavy cloth. "Canvass" means to seek support or opinions, usually by going door to door. Ex.: The artist painted on a canvas. The politician will canvass the neighborhood for votes.