tripper vs stumbler

tripper and stumbler both are nouns.

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

As nouns, tripper and stumbler are synonyms defined as:

tripper (noun)	stumbler (noun)
a catch mechanism that acts as a switch	a walker or runner who trips and almost falls
a tourist who is visiting sights of interest	someone who makes mistakes because of incompetence
a walker or runner who trips and almost falls
(slang) someone who has taken a psychedelic drug and is undergoing hallucinations