tabulator vs collator

tabulator and collator both are nouns.

Word	Noun	Adjective	Verb	Adverb
tabulator	Yes	No	No	No
collator	Yes	No	No	No

As nouns, collator is a hyponym of tabulator; that is, collator is a word with a more specific, narrower meaning than tabulator:

tabulator: an electromechanical machine designed to assist in summarizing information and, later, accounting.
collator: a machine that selects, merges and matches decks of punch cards.

tabulator (noun)	collator (noun)
a calculator that keeps a record of the number of times something happens	a machine that selects, merges and matches decks of punch cards.
an electromechanical machine designed to assist in summarizing information and, later, accounting.