They started as same word, but their meanings have drifted apart over time.
How the irregular 'snuck' sneaked into the dictionary
And how did it get that name?
Why does it sound strange to say 'funner' or 'funnest?'
Is 'alright' all right?
Many of today's grammar rules can be traced to the opinions of one 18th century writer.
Good news for those who feel stuffy saying 'whom.'