electronic stylus vs light pen

electronic stylus and light pen both are nouns.

Word	Noun	Adjective	Verb	Adverb
electronic stylus	Yes	No	No	No
light pen	Yes	No	No	No

As nouns, electronic stylus and light pen are synonyms defined as:

electronic stylus and light pen: (computer science) a pointer that when pointed at a computer display senses whether or not the spot is illuminated

electronic stylus (noun)	light pen (noun)
(computer science) a pointer that when pointed at a computer display senses whether or not the spot is illuminated	(computer science) a pointer that when pointed at a computer display senses whether or not the spot is illuminated