light filter vs diffusing screen

light filter and diffusing screen both are nouns.

Word	Noun	Adjective	Verb	Adverb
light filter	Yes	No	No	No
diffusing screen	Yes	No	No	No

As nouns, light filter and diffusing screen are synonyms defined as:

light filter and diffusing screen: a transparent filter that reduces the light (or some wavelengths of the light) passing through it

light filter (noun)	diffusing screen (noun)
a transparent filter that reduces the light (or some wavelengths of the light) passing through it	a transparent filter that reduces the light (or some wavelengths of the light) passing through it