They started as same word, but their meanings have drifted apart over time.
A simple way to keep them apart. (Most of the time.)
The awkward case of 'his or her'
Comedian ISMO on the complexities of the word 'tip'
We're intent on clearing it up
Soop, wimmen, and headake did not make the cut
'Poets laureate'? 'Court-martials'? The curious history of postpositive adjectives in English.