public boolean isWord(String word) {
Letter thisLetter = root;
while (word.length() > 0) {
Character thisChar = word.charAt(0);
word = word.substring(1);
if (!thisLetter.hasChild(thisChar)) {
return false;
} else {
thisLetter = thisLetter.getChild(thisChar);
}
}
return thisLetter.isWord();
}
