os vs matrix

os and matrix both are nouns.

Word	Noun	Adjective	Verb	Adverb
os	Yes	No	No	No
matrix	Yes	No	No	No

os (noun)	matrix (noun)
rigid connective tissue that makes up the skeleton of vertebrates	mold used in the production of phonograph records, type, or other relief surface
a mouth or mouthlike opening	the formative tissue at the base of a nail
	the body substance in which tissue cells are embedded
	(mathematics) a rectangular array of quantities or expressions set out by rows and columns; treated as a single element and manipulated according to rules
	an enclosure within which something originates or develops
	(geology) a mass of fine-grained rock in which fossils, crystals, or gems are embedded