flashbulb vs flash lamp

flashbulb and flash lamp both are nouns.

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

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

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

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

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