financial support vs financial backing

financial support and financial backing both are nouns.

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

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

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

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

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