invasion vs entering

invasion and entering both are nouns.

Word	Noun	Adjective	Verb	Adverb
invasion	Yes	No	No	No
entering	Yes	No	No	No

As nouns, entering is a hypernym of invasion; that is, entering is a word with a broader meaning than invasion:

Other hypernyms of invasion include entrance.

invasion (noun)	entering (noun)
the act of invading; the act of an army that invades for conquest or plunder	the act of entering
any entry into an area not previously occupied	a movement into or inward
(pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body