"Adjective Cards" consist of 200 pairs of opposite adjectives that English language learners can use to play a guessing game in order to learn vocabulary in general and adjectives in particular. The cards are roughly arranged in order of frequency. The guessing game is quite simple: each learner quizzes her partner about the opposite adjective. For example, the partner holding a card asks, "What's the opposite of XXX?" If the listening partner doesn't know, the asking partner may give a hint, gesture, or word translation. Cards are passed around the room so all learners get the chance to guess. Learners will gain a deeper understanding of what an adjective is and deepen their knowledge of specific vocabulary with this enjoyable, interactive activity.