vibrion vs eubacteria

vibrion and eubacteria both are nouns.

Word	Noun	Adjective	Verb	Adverb
vibrion	Yes	No	No	No
eubacteria	Yes	No	No	No

As nouns, eubacteria is a hypernym of vibrion; that is, eubacteria is a word with a broader meaning than vibrion:

vibrion: curved rodlike motile bacterium
eubacteria: a large group of bacteria having rigid cell walls; motile types have flagella

Other hypernyms of vibrion include eubacterium, true bacteria.

vibrion (noun)	eubacteria (noun)
curved rodlike motile bacterium	a large group of bacteria having rigid cell walls; motile types have flagella