cobweb vs gossamer

cobweb and gossamer both are nouns.

Word	Noun	Adjective	Verb	Adverb
cobweb	Yes	No	No	No
gossamer	Yes	Yes	No	No

As nouns, cobweb and gossamer are synonyms defined as:

cobweb (noun)	gossamer (noun)
a dense elaborate spider web that is more efficient than the orb web	a gauze fabric with an extremely fine texture
filaments from a web that was spun by a spider	filaments from a web that was spun by a spider
a fabric so delicate and transparent as to resemble a web of a spider

cobweb (adjective)	gossamer (adjective)
	characterized by unusual lightness and delicacy
	so thin as to transmit light