halobacteria vs halophil

halobacteria and halophil both are nouns.

Word	Noun	Adjective	Verb	Adverb
halobacteria	Yes	No	No	No
halophil	Yes	No	No	No

As nouns, halophil is a hypernym of halobacteria; that is, halophil is a word with a broader meaning than halobacteria:

halobacteria: halophiles in saline environments such as the Dead Sea or salt flats
halophil: archaebacteria requiring a salt-rich environment for growth and survival

Other hypernyms of halobacteria include halophile.

halobacteria (noun)	halophil (noun)
halophiles in saline environments such as the Dead Sea or salt flats	archaebacteria requiring a salt-rich environment for growth and survival