Word Bubbles and Word Bubbles Rising look up words in a fairly large dictionary, so they should include common words in both American and UK/British English, but may omit some technical terms and newer words. Neither game will accept any of the following words:

Word Bubbles and Word Bubbles Rising will NOT accept

• Contractions (words containing apostrophes such as "can't")
• Slang (words that have not been recognized by a reputable dictionary)
• Proper nouns (words that start with an uppercase letter such as California or Christmas.) If a word that is a proper noun is accepted it is because there is also a common noun definition of this word.