Group Anagram words in Salesforce Apex.

anagramGrouped.apex

List<String> listWords = new List<String>{'bored','robed','cat','act','tac','eme'};

Map<String,List<String>> mapWords = new Map<String,List<String>>();

for(String word: listWords){
    List<String> splittedWord = word.split('');
    splittedWord.sort();

    String wordNew = '';
    for(String newWord:splittedWord){
       wordNew += newWord;
    }

    if(mapWords.containsKey(wordNew)){
        List<String> words = mapWords.get(wordNew);
        words.add(word);
        mapWords.put(wordNew, words);
    }
    else{
        mapWords.put(wordNew,new List<String>{word});
    }
}

System.debug(mapWords.values());