duodiode vs diode

duodiode and diode both are nouns.

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

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

duodiode: an electron tube having two diodes in the same envelope, with either a common cathode or separate cathodes.
diode: a thermionic tube having two electrodes; used as a rectifier

Other hypernyms of duodiode include rectifying tube, rectifying valve.

duodiode (noun)	diode (noun)
an electron tube having two diodes in the same envelope, with either a common cathode or separate cathodes.	a semiconductor that consists of a p-n junction
	a thermionic tube having two electrodes; used as a rectifier