They started as same word, but their meanings have drifted apart over time.
'Poets laureate'? 'Court-martials'? The curious history of postpositive adjectives in English.
There, there. We'll sort it out.
Figuring it out at once
Is there one standard way?
Why both words are equally good for you.
You don't have to end all your adverbs in -ly to talk right.