Host-Hose
Coot-Cost
Scot-soot
Erstwhile-umbrage
Slam-Scam
Kleptomaniac-torment
Snap-Knap
Coup-Soup
Crop-coop
Dendrochronology-rustic
Brew-Brow
Chew-Crew
Dhow-Chow (seriously, it's a type of dog)
Shot-Show
Gossip-honoured
Stor-Stop
Romanticised-answer
Rorqual-lowland
Star-Stir
Seam-Scam
Veal-Seal
Mean-Meal
Moat-Meat
Goal-Goat
Foul-Soul
Cool-Fool
Goal-Coal
Boat-Goat
Attended-answer
Moat-Moot