stone splitter vs stone splitting machine

stone splitter and stone splitting machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
stone splitter	Yes	No	No	No
stone splitting machine	Yes	No	No	No

As nouns, stone splitter and stone splitting machine are synonyms defined as:

stone splitter and stone splitting machine: a machine for splitting natural stone including granite, marble, and sandstone.

stone splitter (noun)	stone splitting machine (noun)
a machine for splitting natural stone including granite, marble, and sandstone.	a machine for splitting natural stone including granite, marble, and sandstone.