rail-splitter vs splitter

rail-splitter and splitter both are nouns.

Word	Noun	Adjective	Verb	Adverb
rail-splitter	Yes	No	No	No
splitter	Yes	No	No	No

As nouns, rail-splitter and splitter are synonyms defined as:

rail-splitter and splitter: a laborer who splits logs to build split-rail fences

rail-splitter (noun)	splitter (noun)
a laborer who splits logs to build split-rail fences	a taxonomist who classifies organisms into many groups on the basis of relatively minor characteristics
	a worker who splits fish and removes the backbone
	a laborer who splits logs to build split-rail fences