sheet vs reef

sheet and reef both are nouns.

Word	Noun	Adjective	Verb	Adverb
sheet	Yes	No	Yes	No
reef	Yes	No	Yes	No

sheet (noun)	reef (noun)
bed linen consisting of a large rectangular piece of cotton or linen cloth; used in pairs	one of several strips across a sail that can be taken in or rolled up to lessen the area of the sail that is exposed to the wind
(nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind	a submerged ridge of rock or coral near the surface of the water
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)	reef (verb)
cover with a sheet, as if by wrapping	roll up (a portion of a sail) in order to reduce its area
come down as if in sheets	reduce (a sail) by taking in a reef
	lower and bring partially inboard