Ascension of Christ vs Ascension

Ascension of Christ and Ascension both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ascension of Christ	Yes	No	No	No
Ascension	Yes	No	No	No

As nouns, Ascension of Christ and Ascension are synonyms defined as:

Ascension of Christ and Ascension: (New Testament) the rising of the body of Jesus into heaven on the 40th day after his Resurrection

Other synonyms of Ascension of Christ include Ascension of Jesus.

Ascension of Christ (noun)	Ascension (noun)
(New Testament) the rising of the body of Jesus into heaven on the 40th day after his Resurrection	(New Testament) the rising of the body of Jesus into heaven on the 40th day after his Resurrection
	(Christianity) celebration of the Ascension of Christ into heaven; observed on the 40th day after Easter