semiconductor diode vs diode

semiconductor diode and diode both are nouns.

Word	Noun	Adjective	Verb	Adverb
semiconductor diode	Yes	No	No	No
diode	Yes	No	No	No

As nouns, semiconductor diode and diode are synonyms defined as:

semiconductor diode and diode: a semiconductor that consists of a p-n junction

Other synonyms of semiconductor diode include crystal rectifier, junction rectifier.

semiconductor diode (noun)	diode (noun)
a semiconductor that consists of a p-n junction	a semiconductor that consists of a p-n junction
	a thermionic tube having two electrodes; used as a rectifier