They started as same word, but their meanings have drifted apart over time.
You don't have to end all your adverbs in -ly to talk right.
How 'literally' can mean "figuratively"
An imaginary word that snuck into the dictionary
Good news for those who feel stuffy saying 'whom.'
Head, shoulders, metaphors, and toes
'Poets laureate'? 'Court-martials'? The curious history of postpositive adjectives in English.