tourer vs rubberneck

tourer and rubberneck both are nouns.

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

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

Other hyponyms of tourer include excursionist, sightseer, tripper.

tourer (noun)	rubberneck (noun)
large open car seating four with folding top	a person who stares inquisitively
someone who travels for pleasure	a tourist who is visiting sights of interest

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