core shooter vs core shooting machine

core shooter and core shooting machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
core shooter	Yes	No	No	No
core shooting machine	Yes	No	No	No

As nouns, core shooter and core shooting machine are synonyms defined as:

core shooter and core shooting machine: a machine used in the core shooting process for the production of sand cores.

core shooter (noun)	core shooting machine (noun)
a machine used in the core shooting process for the production of sand cores.	a machine used in the core shooting process for the production of sand cores.