particle accelerator vs atom smasher

particle accelerator and atom smasher both are nouns.

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

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

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

Other synonyms of particle accelerator include accelerator.

particle accelerator (noun)	atom smasher (noun)
a scientific instrument that increases the kinetic energy of charged particles	a scientific instrument that increases the kinetic energy of charged particles