interchange vs cash in

interchange is a noun but cash in is not a noun.

Word	Noun	Adjective	Verb	Adverb
interchange	Yes	No	Yes	No
cash in	No	No	Yes	No

As verbs, cash in is a hyponym of interchange; that is, cash in is a word with a more specific, narrower meaning than interchange:

Other hyponyms of interchange include sell, cash, ransom, redeem, redeem, fill in, stand in, sub, substitute, swap, switch, swop, trade, barter, trade, trade in.

interchange (noun)	cash in (noun)
the act of changing one thing for another thing
mutual interaction; the activity of reciprocating or exchanging (especially information)
reciprocal transfer of equivalent sums of money (especially the currencies of different countries)
a junction of highways on different levels that permits traffic to move from one to another without crossing traffic streams

interchange (verb)	cash in (verb)
reverse (a direction, attitude, or course of action)	exchange for cash
cause to change places
give to, and receive from, one another
put in the place of another; switch seemingly equivalent items