As nouns the difference between collaborator and bystander
is that collaborator is a person who works with others towards a common goal while bystander is a person who, although present at some event, does not take part in it; an observer or spectator.
collaborator
English
Noun
(
en noun)
A person who works with others towards a common goal.
A person who cooperates traitorously with an enemy.
See also
* collaborate
* collaboration
bystander
English
Noun
(
en noun)
a person who, although present at some event, does not take part in it; an observer or spectator
See also
* rubberneck