tabulator vs tabulating machine

tabulator and tabulating machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
tabulator	Yes	No	No	No
tabulating machine	Yes	No	No	No

As nouns, tabulator and tabulating machine are synonyms defined as:

tabulator and tabulating machine: an electromechanical machine designed to assist in summarizing information and, later, accounting.

tabulator (noun)	tabulating machine (noun)
a calculator that keeps a record of the number of times something happens	an electromechanical machine designed to assist in summarizing information and, later, accounting.
an electromechanical machine designed to assist in summarizing information and, later, accounting.