yardmaster vs train dispatcher

yardmaster and train dispatcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
yardmaster	Yes	No	No	No
train dispatcher	Yes	No	No	No

As nouns, yardmaster and train dispatcher are synonyms defined as:

yardmaster and train dispatcher: a railroad employer who is in charge of a railway yard

Other synonyms of yardmaster include trainmaster.

yardmaster (noun)	train dispatcher (noun)
a railroad employer who is in charge of a railway yard	a railroad employer who is in charge of a railway yard