silk serge vs fabric

silk serge and fabric both are nouns.

Word	Noun	Adjective	Verb	Adverb
silk serge	Yes	No	No	No
fabric	Yes	No	No	No

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

silk serge: a twilled silk fabric used mostly for lining parts of gentlemen's coats.
fabric: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of silk serge include cloth, material, textile.

silk serge (noun)	fabric (noun)
a twilled silk fabric used mostly for lining parts of gentlemen's coats.	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
	the underlying structure