spreading vs invasion

spreading and invasion both are nouns.

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

As nouns, invasion is a hyponym of spreading; that is, invasion is a word with a more specific, narrower meaning than spreading:

spreading: process or result of distributing or extending over a wide expanse of space
invasion: (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body

Other hyponyms of spreading include diffusion, dispersion, scattering, irradiation, radiation.

spreading (noun)	invasion (noun)
act of extending over a wider scope or expanse of space or time	the act of invading; the act of an army that invades for conquest or plunder
the opening of a subject to widespread discussion and debate	any entry into an area not previously occupied
process or result of distributing or extending over a wide expanse of space	(pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body