leptospira vs spirochaete

leptospira and spirochaete both are nouns.

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

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

leptospira: important pathogens causing Weil's disease or canicola fever
spirochaete: parasitic or free-living bacteria; many pathogenic to humans and other animals

Other hypernyms of leptospira include spirochete.

leptospira (noun)	spirochaete (noun)
important pathogens causing Weil's disease or canicola fever	parasitic or free-living bacteria; many pathogenic to humans and other animals