sheet vs facet plane

sheet and facet plane both are nouns.

Word	Noun	Adjective	Verb	Adverb
sheet	Yes	No	Yes	No
facet plane	Yes	No	No	No

As nouns, facet plane is a hyponym of sheet; that is, facet plane is a word with a more specific, narrower meaning than sheet:

Other hyponyms of sheet include Cartesian plane, midline, midplane, orbital plane, picture plane, tangent plane.

sheet (noun)	facet plane (noun)
bed linen consisting of a large rectangular piece of cotton or linen cloth; used in pairs	the plane of a facet of an object (as of a cube)
(nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind
a flat artifact that is thin relative to its length and width
a large piece of fabric (usually canvas fabric) by means of which wind is used to propel a sailing vessel
paper used for writing or printing
newspaper with half-size pages
any broad thin expanse or surface
(mathematics) an unbounded two-dimensional shape

sheet (verb)	facet plane (verb)
cover with a sheet, as if by wrapping
come down as if in sheets