zenerdiode vs diode

zenerdiode and diode both are nouns.

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

As nouns, diode is a hypernym of zenerdiode; that is, diode is a word with a broader meaning than zenerdiode:

zenerdiode: a semiconductor diode that exhibits a sharp increase in reverse current at a well-defined reverse voltage: used as a voltage regulator
diode: a semiconductor that consists of a p-n junction

Other hypernyms of zenerdiode include crystal rectifier, junction rectifier, semiconductor diode.

zenerdiode (noun)	diode (noun)
a semiconductor diode that exhibits a sharp increase in reverse current at a well-defined reverse voltage: used as a voltage regulator	a semiconductor that consists of a p-n junction
	a thermionic tube having two electrodes; used as a rectifier