demo vs show

demo and show both are nouns.

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

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

As verbs, demo and show are synonyms defined as:

Other synonyms of demo include demonstrate, exhibit, present.

As verbs, show is a hypernym of demo; that is, show is a word with a broader meaning than demo:

demo (noun)	show (noun)
a visual presentation showing how something works	an act or social event involving a public performance or entertainment
	pretending that something is the case in order to make a good impression
	something intended to communicate a particular impression

demo (verb)	show (verb)
give an exhibition of to an interested audience	establish the validity of something, as by an example, explanation or experiment
	provide evidence for
	indicate a place, direction, person, or thing; either spatially or figuratively
	give expression to
	give evidence of, as of records
	indicate a certain reading; of gauges and instruments
	finish third or better in a horse or dog race
	show in, or as in, a picture
	take (someone) to their seats, as in theaters or auditoriums
	make visible or noticeable
	be or become visible or noticeable
	give an exhibition of to an interested audience