tripper vs rubberneck

tripper and rubberneck both are nouns.

Word	Noun	Adjective	Verb	Adverb
tripper	Yes	No	No	No
rubberneck	Yes	No	Yes	No

As nouns, tripper and rubberneck are synonyms defined as:

Other synonyms of tripper include excursionist, sightseer.

tripper (noun)	rubberneck (noun)
a catch mechanism that acts as a switch	a person who stares inquisitively
a tourist who is visiting sights of interest	a tourist who is visiting sights of interest
a walker or runner who trips and almost falls
(slang) someone who has taken a psychedelic drug and is undergoing hallucinations

tripper (verb)	rubberneck (verb)
	strain to watch; stare curiously