They started as same word, but their meanings have drifted apart over time.
We believe the popular usage of this word is correct
Here's the lowdown on what may be the most confusing pair of words in the English language.
English was never the same after the Norman Conquest
How 'literally' can mean "figuratively"
'Mischievous,' 'nuclear,' and other words to pronounce with caution.
Head, shoulders, metaphors, and toes