flashgun vs flash lamp

flashgun and flash lamp both are nouns.

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

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

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

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

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