Connections Hint Today Wed, Mar 12 #678

Need help with Connections puzzle #678 on Wed, Mar 12? Get your daily connections hint today! Find the hidden links between these 16 words: BUTTER, EGGS, FLOUR, SUGAR, CARDINAL, ELMO, KETCHUP, ROSE, MONTH, ORANGE, PURPLE, SILVER, COTTON, EYE, JOHN, ROCK