We don't have synonyms for nailgun yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are nail gun and railgun.
(n) :
Alternative spelling of nail gun. [A power tool used to drive nails into a surface easily. It is powered pneumatically, electrically, or in some cases with a propellant cartridge; conceptually akin to air guns and firearms.]
(n) :
Alternative spelling of nail gun. [A power tool used to drive nails into a surface easily. It is powered pneumatically, electrically, or in some cases with a propellant cartridge; conceptually akin to air guns and firearms.]