Think.
Thunk.
Clunk.
Clank.
Flank.
Flunk.
Bunk.
Bank.
Crank.
Crack.
Crackle.
Cackle.
Tackle.
Tickle.
Fickle.
Pickle.
.......

Think.
Thank.
Spank.
Tank.
Tang.
Bang.
Bung.
Rung.
Ring.
Bling.
Bing.
Bong.
Dong.
Dung.
Dunce.
Once.
Wince.
Quince.
.....

Think.
Wink.
Blink.
Stink.
Stick.
Wick.
Wok.
Rock.
Spock.
Dock.
Deck.
Neck.
Speck.
Trek.
Track.
Truck.
Truckle.
Knuckle.
Buckle.
Belt.
Welt.
Melt.
Malt.


hmm...one was mentally doing this, and one had got from Think to Klutz...but one's fingers seem to have life of their own. And one keeps ending with food.