Grom
Grom may refer to:

Military
JW GROM, a Polish special forces unit
ORP Grom, several ships of the Polish Navy
Grom (missile), a Polish anti-aircraft missile
A Yugoslav/Serbian version of the Kh-23 (AS-9 'Kyle') air-to-surface missile
2A28 Grom, a Russian low pressure gun
Hrim-2, a missile being developed by Ukraine

People
Franc Grom, Slovenian artist

Other uses
Gragjanska оpcija za Makedonija (Citizen Option for Macedonia), a political party in North Macedonia
Grom (company), an Italian gelato company
Honda Grom, a motorcycle
Grom (album), an album by Polish extreme metal band Behemoth
GROM, Graphics Read Only Memory, a type of memory used in the TI-99/4A Home Computer
Grommet (sportsperson), a nickname for young participants in extreme sports
Grom, Warmian-Masurian Voivodeship (north Poland)
River Grom, England