halophile vs archaebacterium

halophile and archaebacterium both are nouns.

Word	Noun	Adjective	Verb	Adverb
halophile	Yes	No	No	No
archaebacterium	Yes	No	No	No

As nouns, archaebacterium is a hypernym of halophile; that is, archaebacterium is a word with a broader meaning than halophile:

halophile: archaebacteria requiring a salt-rich environment for growth and survival
archaebacterium: considered ancient life forms that evolved separately from bacteria and blue-green algae

Other hypernyms of halophile include archaebacteria, archaeobacteria, archeobacteria.

halophile (noun)	archaebacterium (noun)
archaebacteria requiring a salt-rich environment for growth and survival	considered ancient life forms that evolved separately from bacteria and blue-green algae