plain / plane [plein]
plain – adj., adv., n. & v. – adj. – 1. level, flat, smooth; 2. unadorned, unpatterned; 3. fully attended, complete; adv. – 1. obviously, distinctly, without ostentation; 2. completely, entirely; n. – 1. broad, comparatively flat land, especially grasslands; 2. a horizontal flat surface; 3. something simple or unadorned; 4. in clear term without any concealment; 5. a lament or cry; v. – 1. lodge a formal complaint; 2. express sorrow or dissatisfaction
plane – n. & v. – adj. – completely flat; n. – 1. a tool used to smooth a surface; 2. a large, deciduous tree of the genus, Platanus spp. resembling a sycamore tree; 3. a two-dimensional geometric surface; 4. the act of skimming the surface; 5. an airplane; v. – 1. level, make smooth; 2. excuse, explain away; 3. soar with motionless wings; 4. travel by air