last rites vs anointing of the sick

last rites and anointing of the sick both are nouns.

Word	Noun	Adjective	Verb	Adverb
last rites	Yes	No	No	No
anointing of the sick	Yes	No	No	No

As nouns, last rites and anointing of the sick are synonyms defined as:

last rites and anointing of the sick: a Catholic sacrament; a priest anoints a dying person with oil and prays for salvation

Other synonyms of last rites include extreme unction.

last rites (noun)	anointing of the sick (noun)
rites performed in connection with a death or burial	a Catholic sacrament; a priest anoints a dying person with oil and prays for salvation
a Catholic sacrament; a priest anoints a dying person with oil and prays for salvation