They started as same word, but their meanings have drifted apart over time.
Comedian ISMO on what separates a boot from a trunk
A definitive answer.
Why both words are equally good for you.
Many of today's grammar rules can be traced to the opinions of one 18th century writer.
And is one way more correct than the others?
'Mischievous,' 'nuclear,' and other words to pronounce with caution.