tallyman vs tally clerk

tallyman and tally clerk both are nouns.

Word	Noun	Adjective	Verb	Adverb
tallyman	Yes	No	No	No
tally clerk	Yes	No	No	No

As nouns, tallyman and tally clerk are synonyms defined as:

tallyman and tally clerk: one who keeps a tally of quantity or weight of goods produced or shipped or received

tallyman (noun)	tally clerk (noun)
one who keeps a tally of quantity or weight of goods produced or shipped or received	one who keeps a tally of quantity or weight of goods produced or shipped or received
one who sells goods on the installment plan