They started as same word, but their meanings have drifted apart over time.
How 'literally' can mean "figuratively"
Comedian ISMO on what separates a boot from a trunk
Figuring it out at once
Our research turned up two archaic literal meanings
How an ancient philosophical movement devoted to the pursuit of virtue came to describe eye-rolling criticism.
'Poets laureate'? 'Court-martials'? The curious history of postpositive adjectives in English.