financial backing vs financial support

financial backing and financial support both are nouns.

Word	Noun	Adjective	Verb	Adverb
financial backing	Yes	No	No	No
financial support	Yes	No	No	No

As nouns, financial backing and financial support are synonyms defined as:

financial backing and financial support: financial resources provided to make some project possible

Other synonyms of financial backing include backing, funding, support.

financial backing (noun)	financial support (noun)
financial resources provided to make some project possible	financial resources provided to make some project possible