flicker vs flash

flicker and flash both are nouns.

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

As nouns, flash is a hypernym of flicker; that is, flash is a word with a broader meaning than flicker:

As verbs, flash is a hypernym of flicker; that is, flash is a word with a broader meaning than flicker:

Other hypernyms of flicker include blink, twinkle, wink, winkle.

flicker (noun)	flash (noun)
the act of moving back and forth	a lamp for providing momentary light to take a photograph
North American woodpecker	a bright patch of color used for decoration or identification
a momentary flash of light	a momentary brightness
	a sudden brilliant understanding
	a short news announcement concerning some on-going news story
	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)

flicker (adjective)	flash (adjective)
	tastelessly showy

flicker (verb)	flash (verb)
move back and forth very rapidly	appear briefly
flash intermittently	emit a brief burst of light
shine unsteadily	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