accelerator vs atom smasher

accelerator and atom smasher both are nouns.

Word	Noun	Adjective	Verb	Adverb
accelerator	Yes	No	No	No
atom smasher	Yes	No	No	No

As nouns, accelerator and atom smasher are synonyms defined as:

accelerator and atom smasher: a scientific instrument that increases the kinetic energy of charged particles

Other synonyms of accelerator include particle accelerator.

accelerator (noun)	atom smasher (noun)
a valve that regulates the supply of fuel to the engine	a scientific instrument that increases the kinetic energy of charged particles
a scientific instrument that increases the kinetic energy of charged particles
a pedal that controls the throttle valve
(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected