filament vs gossamer

filament and gossamer both are nouns.

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

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

Other hyponyms of filament include barb, cobweb, chromatid, myofibril, myofibrilla, sarcostyle, rhizoid, hypha, paraphysis.

filament (noun)	gossamer (noun)
a thin wire (usually tungsten) that is heated white hot by the passage of an electric current	a gauze fabric with an extremely fine texture
a threadlike structure (as a chainlike series of cells)	filaments from a web that was spun by a spider
the stalk of a stamen
a very slender natural or synthetic fiber

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