Make do vs. Make Due – What’s the Difference?
Make do is the standard form.
Maleficent vs. malevolent
Malevolent: ill-willed without action. Maleficent: ill-willed with action.
Mantel vs. mantle
Mantle: 1. a loose, sleeveless coat or cloak; 2. something that covers; 3. the layer of the Earth between the crust and the core; 4. the cerebral cortex. Mantel: an ornamental shelf above a fireplace.
Moot vs. mute
Moot: 1. subject to debate; 2. of no importance or merely hypothetical. Mute: silent.
Masterful vs. masterly
Historically they have differed, but today they both mean with virtuosic skill.
Moustache vs. mustache (vs. mustachio)
mustache in the U.S.; moustache everywhere else. A mustachio is an especially luxuriant mustache.