photoflash vs flashgun

photoflash and flashgun both are nouns.

Word	Noun	Adjective	Verb	Adverb
photoflash	Yes	No	No	No
flashgun	Yes	No	No	No

As nouns, photoflash and flashgun are synonyms defined as:

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

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

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