This essay studies the words in English and Chinese advertising on the basis of the observation and statistics of words with high frequency in 100 commercial advertisements (50 English advertisements and 50 Chinese advertisements respectively). Based on the theories of lexicology and advertising psychology,such a comparative study is conducted with focus on word classes,namely,nouns,verbs and adjectives semantically. Moreover,the features of words are further analyzed with examples in the hope that English and Chinese advertisements could be understood better in the light of the linguistic meanings and cultural backgound of the advertisements.