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PLAIN/PLANE |
Both of these words have to do with flatness. A flat prairie is a plain, and you use a plane to smooth flat a piece of wood.
“Plain” is also an adjective which can describe things that are ordinary, simple, or unattractive.
But whether you go the airport to catch a plane or meditate to achieve a higher plane of consciousness, the meanings that have to do with things high up are spelled “plane.”