rattail vs grenadier

rattail and grenadier both are nouns.

Word	Noun	Adjective	Verb	Adverb
rattail	Yes	No	No	No
grenadier	Yes	No	No	No

As nouns, rattail and grenadier are synonyms defined as:

rattail and grenadier: deep-sea fish with a large head and body and long tapering tail

Other synonyms of rattail include rattail fish.

rattail (noun)	grenadier (noun)
deep-sea fish with a large head and body and long tapering tail	deep-sea fish with a large head and body and long tapering tail
	an infantryman equipped with grenades