They started as same word, but their meanings have drifted apart over time.
How to remember which is which
Thawing one of the mysteries of English
The most common vowel sound in English causes many spelling problems.
Why does it sound strange to say 'funner' or 'funnest?'
You don't have to end all your adverbs in -ly to talk right.
Often used, often confused. Here's some guidance and insight.