halobacterium vs halophil

halobacterium and halophil both are nouns.

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

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

halobacterium: 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 halobacterium include halophile.

halobacterium (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