basis vs footing

basis and footing both are nouns.

Word	Noun	Adjective	Verb	Adverb
basis	Yes	No	No	No
footing	Yes	No	No	No

As nouns, basis and footing are synonyms defined as:

basis and footing: a relation that provides the foundation for something

Other synonyms of basis include ground.

basis (noun)	footing (noun)
the fundamental assumptions from which something is begun or developed or calculated or explained	a place providing support for the foot in standing or climbing
a relation that provides the foundation for something	a relation that provides the foundation for something
the most important or necessary part of something	status with respect to the relations between people or groups