triode vs vacuum tube

triode and vacuum tube both are nouns.

Word	Noun	Adjective	Verb	Adverb
triode	Yes	No	No	No
vacuum tube	Yes	No	No	No

As nouns, vacuum tube is a hypernym of triode; that is, vacuum tube is a word with a broader meaning than triode:

triode: a thermionic vacuum tube having three electrodes; fluctuations of the charge on the grid control the flow from cathode to anode which makes amplification possible
vacuum tube: electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope

Other hypernyms of triode include electron tube, thermionic tube, thermionic vacuum tube, thermionic valve, tube.

triode (noun)	vacuum tube (noun)
a thermionic vacuum tube having three electrodes; fluctuations of the charge on the grid control the flow from cathode to anode which makes amplification possible	electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope