eternal rest vs eternal sleep

eternal rest and eternal sleep both are nouns.

Word	Noun	Adjective	Verb	Adverb
eternal rest	Yes	No	No	No
eternal sleep	Yes	No	No	No

As nouns, eternal rest and eternal sleep are synonyms defined as:

eternal rest and eternal sleep: euphemisms for death (based on an analogy between lying in a bed and in a tomb)

Other synonyms of eternal rest include quietus, rest, sleep.

eternal rest (noun)	eternal sleep (noun)
euphemisms for death (based on an analogy between lying in a bed and in a tomb)	euphemisms for death (based on an analogy between lying in a bed and in a tomb)