farther vs far

farther and far both are adjectives.

Word	Noun	Adjective	Verb	Adverb
farther	No	Yes	No	Yes
far	No	Yes	No	Yes

farther (adjective)	far (adjective)
more distant in especially space or time	located at a great distance in time or space or degree
more distant in especially degree	beyond a norm in opinion or actions
	being of a considerable distance or length
	being the animal or vehicle on the right or being on the right side of an animal or vehicle

farther (adverb)	far (adverb)
to or at a greater distance in time or space (`farther' is used more frequently than `further' in this physical sense)	at or to or from a great distance in space
to or at a greater extent or degree or a more advanced stage (`further' is used more often than `farther' in this abstract sense)	remote in time
	to a considerable degree; very much
	at or to a certain point or degree
	to an advanced stage or point