In the rule “Scoring”, change
add 1 to that Wordsmith’s Points and remove that word from that Wordsmith’s Favorites.
to
add 1 each to that Wordsmith’s Points and Coins and remove that word from that Wordsmith’s Favorites.
Add the following text to the end of the rule Favorites:
A Wordsmith may spend 1 Coin to remove one of their own Favorites, specifying which Favorite in the wiki update that spends the coin.