semiconductor diode vs crystal rectifier

semiconductor diode and crystal rectifier both are nouns.

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

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

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

Other synonyms of semiconductor diode include diode, junction rectifier.

semiconductor diode (noun)	crystal rectifier (noun)
a semiconductor that consists of a p-n junction	a semiconductor that consists of a p-n junction