gegenschein vs visible light

gegenschein and visible light both are nouns.

Word	Noun	Adjective	Verb	Adverb
gegenschein	Yes	No	No	No
visible light	Yes	No	No	No

As nouns, visible light is a hypernym of gegenschein; that is, visible light is a word with a broader meaning than gegenschein:

gegenschein: a faint spot of light in the night sky that appears directly opposite the position of the sun; a reflection of sunlight by micrometeoric material in space
visible light: (physics) electromagnetic radiation that can produce a visual sensation

Other hypernyms of gegenschein include light, visible radiation.

gegenschein (noun)	visible light (noun)
a faint spot of light in the night sky that appears directly opposite the position of the sun; a reflection of sunlight by micrometeoric material in space	(physics) electromagnetic radiation that can produce a visual sensation