deletion vs removal

deletion and removal both are nouns.

Word	Noun	Adjective	Verb	Adverb
deletion	Yes	No	No	No
removal	Yes	No	No	No

As nouns, removal is a hypernym of deletion; that is, removal is a word with a broader meaning than deletion:

Other hypernyms of deletion include remotion.

deletion (noun)	removal (noun)
the act of deleting something written or printed	the act of removing
the omission that is made when an editorial change shortens a written passage	dismissal from office
(genetics) the loss or absence of one or more nucleotides from a chromosome
any process whereby sounds or words are left out of spoken words or phrases