demo vs manifestation

demo and manifestation both are nouns.

Word	Noun	Adjective	Verb	Adverb
demo	Yes	No	Yes	No
manifestation	Yes	No	No	No

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

Other hyponyms of demo include display, show, expression, reflection, reflexion, exemplification, illustration.

demo (noun)	manifestation (noun)
a visual presentation showing how something works	a public display of group feelings (usually of a political nature)
	a manifest indication of the existence or presence or nature of some person or thing
	expression without words
	a clear appearance
	an appearance in bodily form (as of a disembodied spirit)

demo (verb)	manifestation (verb)
give an exhibition of to an interested audience