They started as same word, but their meanings have drifted apart over time.
Why does it sound strange to say 'funner' or 'funnest?'
Comedian ISMO on the complexities of the word 'tip'
We're gonna stop you right there
'Mischievous,' 'nuclear,' and other words to pronounce with caution.
Why don't they call it the Merriam-Webster comma?
A simple way to keep them apart. (Most of the time.)