railway man vs railroader

railway man and railroader both are nouns.

Word	Noun	Adjective	Verb	Adverb
railway man	Yes	No	No	No
railroader	Yes	No	No	No

As nouns, railway man and railroader are synonyms defined as:

Other synonyms of railway man include railroad man, railwayman, trainman.

railway man (noun)	railroader (noun)
an employee of a railroad	an employee of a railroad