In comparing both words, it can be observed that they have similarities and differences. The similarities are that both words start with the letter ‘f’. Also both words have a letter that is repeated; ‘e’ for fifteen and ‘t’ for flatter. Both words have 2 kinds of vowels; ‘i’ and ‘e’ for fifteen and ‘a’ and ‘e’ for flatter. Both words also have 7 letters. The main difference between the two is the meaning. Another difference is the words end differently; ‘n’ for fifteen and ‘r’ for flatter.