As nouns the difference between collator and rollator
is that collator is a person who collates while rollator is a walking frame equipped with wheels, especially one designed for disabled or elderly.
collator
English
Noun
(
en noun)
a person who collates
(obsolete, computing) a machine that selects, merges and matches decks of punch cards; a program that merges files
a police officer who maintains criminal records and analyzes them for intelligence
rollator
English
Noun
(
en noun)
A walking frame equipped with wheels, especially one designed for disabled or elderly.