display vs flash

display and flash both are nouns.

Word	Noun	Adjective	Verb	Adverb
display	Yes	No	Yes	No
flash	Yes	Yes	Yes	No

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

Other hyponyms of display include acting out, array, screening, showing, viewing, sight, fanfare, ostentation, flaunt, presentation.

As verbs, flash is a hyponym of display; that is, flash is a word with a more specific, narrower meaning than display:

display (noun)	flash (noun)
something shown to the public	a lamp for providing momentary light to take a photograph
a visual representation of something	a bright patch of color used for decoration or identification
an electronic device that represents information in visual form	a momentary brightness
exhibiting openly in public view	a sudden brilliant understanding
something intended to communicate a particular impression	a short news announcement concerning some on-going news story
behavior that makes your feelings public	a burst of light used to communicate or illuminate
	a gaudy outward display
	a sudden intense burst of radiant energy
	a short vivid experience
	a very short time (as the time it takes the eye to blink or the heart to beat)

display (adjective)	flash (adjective)
	tastelessly showy

display (verb)	flash (verb)
to show, make visible or apparent	appear briefly
attract attention by displaying some body part or posing; of animals	emit a brief burst of light
	make known or cause to appear with great speed
	protect by covering with a thin sheet of metal
	run or move very quickly or hastily
	gleam or glow intermittently
	display proudly; act ostentatiously or pretentiously
	expose or show briefly