flash lamp vs flash bulb

flash lamp and flash bulb both are nouns.

Word	Noun	Adjective	Verb	Adverb
flash lamp	Yes	No	No	No
flash bulb	Yes	No	No	No

As nouns, flash lamp and flash bulb are synonyms defined as:

flash lamp and flash bulb: a lamp for providing momentary light to take a photograph

Other synonyms of flash lamp include flash, flashbulb, flashgun, photoflash.

flash lamp (noun)	flash bulb (noun)
a lamp for providing momentary light to take a photograph	a lamp for providing momentary light to take a photograph