pecuniary resource vs cash in hand

pecuniary resource and cash in hand both are nouns.

Word	Noun	Adjective	Verb	Adverb
pecuniary resource	Yes	No	No	No
cash in hand	Yes	No	No	No

As nouns, pecuniary resource and cash in hand are synonyms defined as:

Other synonyms of pecuniary resource include finances, funds, monetary resource.

pecuniary resource (noun)	cash in hand (noun)
assets in the form of money	assets in the form of money