"WHO'S" and "WHOSE"
"Who's" is a contraction for "who is." "Whose" indicates possession. Ex.: Who's attending the conference? Whose jacket is this?
"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.
