Para rubber vs caoutchouc

Para rubber and caoutchouc both are nouns.

Word	Noun	Adjective	Verb	Adverb
Para rubber	Yes	No	No	No
caoutchouc	Yes	No	No	No

As nouns, caoutchouc is a hypernym of Para rubber; that is, caoutchouc is a word with a broader meaning than Para rubber:

Para rubber: a type of natural rubber obtained from tropical South American trees
caoutchouc: an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products

Other hypernyms of Para rubber include gum elastic, India rubber, natural rubber, rubber.

Para rubber (noun)	caoutchouc (noun)
a type of natural rubber obtained from tropical South American trees	an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products