As nouns the difference between copter and coater
is that copter is (informal) a helicopter while coater is a machine that coats material with a fluid.
As a verb copter
is (informal|transitive) to helicopter: to transport by helicopter.
copter
English
Noun
(
en noun)
(informal) A helicopter.
* 2005 , (the film),
- Shellie shouts something I can't quite make out over the racket of a passing police copter .
Verb
(
en verb)
(informal) To helicopter: to transport by helicopter.
(informal) To helicopter: to travel by helicopter.
coater
English
Noun
(
en noun)
A machine that coats material with a fluid.
- The curtain coater broke down and the factory had to close temporarily.