nylon vs synthetic fiber

nylon and synthetic fiber both are nouns.

Word	Noun	Adjective	Verb	Adverb
nylon	Yes	No	No	No
synthetic fiber	Yes	No	No	No

As nouns, synthetic fiber is a hypernym of nylon; that is, synthetic fiber is a word with a broader meaning than nylon:

nylon: a thermoplastic polyamide; a family of strong resilient synthetic fibers
synthetic fiber: fiber created from natural materials or by chemical processes

Other hypernyms of nylon include man-made fiber, polyamide, polymeric amide.

nylon (noun)	synthetic fiber (noun)
a group of synthetic fabrics, known generically as aliphatic polyamides	fiber created from natural materials or by chemical processes
a thermoplastic polyamide; a family of strong resilient synthetic fibers