olive drab vs fabric

olive drab and fabric both are nouns.

Word	Noun	Adjective	Verb	Adverb
olive drab	Yes	No	No	No
fabric	Yes	No	No	No

As nouns, fabric is a hypernym of olive drab; that is, fabric is a word with a broader meaning than olive drab:

olive drab: a cloth of an olive-brown color used for military uniforms
fabric: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of olive drab include cloth, material, textile.

olive drab (noun)	fabric (noun)
a cloth of an olive-brown color used for military uniforms	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
military uniform of the United States Army; made from cloth of a dull olive color	the underlying structure
a dull greyish to yellowish or light olive brown