constructive vs plastic

constructive is not a noun while plastic is a noun.

Word	Noun	Adjective	Verb	Adverb
constructive	No	Yes	No	No
plastic	Yes	Yes	No	No

constructive (noun)	plastic (noun)
	a card (usually plastic) that assures a seller that the person using it has sufficient means of payment and that the issuer will see to it that the seller receives payment for the merchandise delivered
	generic name for certain synthetic or semisynthetic materials that can be molded or extruded into objects or films or filaments or used for making e.g. coatings and adhesives

constructive (adjective)	plastic (adjective)
constructing or tending to construct or improve or promote development	forming or capable of forming or molding or fashioning
emphasizing what is laudable or hopeful or to the good	capable of being molded or modeled (especially of earth or clay or other soft material)
	capable of being influenced or formed