railroader vs employee

railroader and employee both are nouns.

Word	Noun	Adjective	Verb	Adverb
railroader	Yes	No	No	No
employee	Yes	No	No	No

As nouns, employee is a hypernym of railroader; that is, employee is a word with a broader meaning than railroader:

railroader (noun)	employee (noun)
an employee of a railroad	a worker who is hired to perform a job