Hay & Hey

Next time your teacher/parent/parole officer tells you, "Hey is for horses," you send 'em a link to this site and explain that there is a clear and accepted spelling difference between the two. :)

Peak & Peek

If I could take a peek at the peak of my career, I wonder if I would be looking into the past or the future...

Update: Please accept my humble apologies for forgetting to include "pique." Let's fix that mistake right here.

Leak & Leek

With an A – undesirable drip.
Double E – desirable vegetable.

Tare & Tear

-are – weight of an empty container.
-ear – rip.

Way, Weigh, Whey

As in, "There's more than one way to weigh whey."