They started as same word, but their meanings have drifted apart over time.
How to 'amuse-bouche' without begging pardon for your French
Or both? Or neither?
The awkward case of 'his or her'
You don't have to end all your adverbs in -ly to talk right.
'Poets laureate'? 'Court-martials'? The curious history of postpositive adjectives in English.
English was never the same after the Norman Conquest