spirochaete vs eubacteria

spirochaete and eubacteria both are nouns.

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

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

spirochaete: parasitic or free-living bacteria; many pathogenic to humans and other animals
eubacteria: a large group of bacteria having rigid cell walls; motile types have flagella

Other hypernyms of spirochaete include eubacterium, true bacteria.

spirochaete (noun)	eubacteria (noun)
parasitic or free-living bacteria; many pathogenic to humans and other animals	a large group of bacteria having rigid cell walls; motile types have flagella