matrix vs os

matrix and os both are nouns.

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

matrix (noun)	os (noun)
mold used in the production of phonograph records, type, or other relief surface	rigid connective tissue that makes up the skeleton of vertebrates
the formative tissue at the base of a nail	a mouth or mouthlike opening
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