flash lamp vs photoflash

flash lamp and photoflash both are nouns.

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

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

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

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

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