Foul & Fowl

With a U – disgusting.
With a W – delicious.

Ceiling & Sealing

As in, "I could spend the weekend sealing the cracks in my ceiling, but I'd rather binge-watch Sherlock."

Pray & Prey

Do I dare make a snarky comment about religion here?
No, I do not. Look, a snake!

Groan & Grown

As in, "You can moan and groan all you want, but the grass needs to be mown because it has grown too long."
See what I did there?