polyester vs Dacron

polyester and Dacron both are nouns.

Word	Noun	Adjective	Verb	Adverb
polyester	Yes	No	No	No
Dacron	Yes	No	No	No

As nouns, Dacron is a hyponym of polyester; that is, Dacron is a word with a more specific, narrower meaning than polyester:

Other hyponyms of polyester include Terylene.

polyester (noun)	Dacron (noun)
any of a large class of synthetic fabrics	a kind of polyester fabric
any of numerous synthetic resins; they are light and strong and weather resistant
a complex ester used for making fibers or resins or plastics or as a plasticizer