In Word Swap, your objective is to earn the most points by spelling words. To do this, players will take turns adding LETTER CARDS to their player area by playing cards out of their hands and trading with their opponents.
But, simply spelling words will not earn you points. Each LETTER CARD in the game displays one or more of a possible 4 different colors - red, blue, green, or yellow. To earn points for each word you spell, at least 3 cards in the word must share color. The more cards that share a color, the more points you earn.
Use uncommon letters to earn wild cards. Use rare letters and complete goals to earn bonus points.
Plan and spell out your words, trade for what you need, and adapt your strategy to win the game!
—description from the designer