Synonyms for coin

Most common

1. Currency — money in general, not limited to coins

money, currency, cash, specie, chink, bread slang US, jack slang dated US AU, wampum slang US, legal tender slang US, dough slang, scratch slang US, mazuma slang US

2. Wedge — A corner or external angle

Other

1. Invent — to make or fabricate (especially a word or phrase)

2. Mint — to make of a definite fineness, and convert into coins, as a mass of metal

Other

strike, neologize, neologise UK, neoterize, neoterise UK

n. 1
Money in general, not limited to coins.
She spent some serious coin on that car!
n. 2
A corner or external angle.
v. 1
To make of a definite fineness, and convert into coins, as a mass of metal.
v. 2
To make or fabricate (especially a word or phrase).
Over the last century the advance in science has led to many new words being coined.

Word family: coinage coin-in-the-slot coinlike coin-operated coiner
Phrases: coin laundry coin cell coin purse coin toss coin die coin pusher coin slot obsidional coin

Plural: coins → moneys, currencies, cashes, species…
Past participle: coined
e.g. coined → invented, originated, created, devised…

Coin, Money or Specie?

Money is the authorized medium of exchange; coined money is called coin or specie.

J. C. Fernald, English Synonyms and Antonyms (1914)

Use in printed books, per decade from 1850 to 2019.

3 letters: bit¹
4 letters: cash¹, jack¹, chip¹, mint¹
5 letters: money², bread¹, dough¹, forge¹, wedge¹, chink¹, quoin¹
6 letters: create², strike¹, invent², devise², specie, wampum², mazuma
7 letters: scratch¹, rouleau²
8 letters: currency³, shilling²
9 letters: originate⁴, fabricate³, neologize, neologise, neoterize, neoterise
11 letters: manufacture⁴, counterfeit³

The small number after each word is its number of syllables (money² = 2 syllables).