spring gun vs set gun

spring gun and set gun both are nouns.

Word	Noun	Adjective	Verb	Adverb
spring gun	Yes	No	No	No
set gun	Yes	No	No	No

As nouns, spring gun and set gun are synonyms defined as:

spring gun and set gun: a gun that is set to fire on any intruder that comes in contact with the wire that sets it off

spring gun (noun)	set gun (noun)
a gun that is set to fire on any intruder that comes in contact with the wire that sets it off	a gun that is set to fire on any intruder that comes in contact with the wire that sets it off