Recommended by Kauane Souza CDG
"THEN" and "THAN"
"Then" relates to time. "Than" is used for comparison. Ex.: First, we'll have lunch, and then we'll go for a walk. He is more experienced than I am.
"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.