tripper vs footer

tripper and footer both are nouns.

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

As nouns, footer is a hypernym of tripper; that is, footer is a word with a broader meaning than tripper:

Other hypernyms of tripper include pedestrian, walker.

tripper (noun)	footer (noun)
a catch mechanism that acts as a switch	a printed note placed below the text on a printed page
a tourist who is visiting sights of interest	a person who travels by foot
a walker or runner who trips and almost falls	(used only in combinations) the height or length of something in feet
(slang) someone who has taken a psychedelic drug and is undergoing hallucinations