ready money vs cold cash

ready money and cold cash both are nouns.

Word	Noun	Adjective	Verb	Adverb
ready money	Yes	No	No	No
cold cash	Yes	No	No	No

As nouns, ready money and cold cash are synonyms defined as:

ready money and cold cash: money in the form of cash that is readily available

Other synonyms of ready money include ready cash.

ready money (noun)	cold cash (noun)
money in the form of cash that is readily available	money in the form of cash that is readily available