Klonowanie i usuwanie wylosowanych obiektów

var dictionary = [];
var test = [];

var word1 = {
    baseWord: "angry",
    translation: "zły",
    baseKey: "pl",
    targetKey: "en"
};
add (word1);

var word2 = {
    baseWord: "happy",
    translation: "szczęśliwy",
    baseKey: "pl",
    targetKey: "en"
};
add (word2);


var word3 = {
    baseWord: "hate",
    translation: "nienawiść",
    baseKey: "pl",
    targetKey: "en"
};
add (word3);


var word4 = {
    baseWord: "bored",
    translation: "znudzony",
    baseKey: "pl",
    targetKey: "en"
};
add (word4);


var word5 = {
    baseWord: "excited",
    translation: "podniecony",
    baseKey: "pl",
    targetKey: "en"
};
add (word5);


var word6 = {
    baseWord: "love",
    translation: "miłość",
    baseKey: "pl",
    targetKey: "en"
};
add (word6);


var word7 = {
    baseWord: "sad",
    translation: "smutny",
    baseKey: "pl",
    targetKey: "en"
};
add (word7);


var word8 = {
    baseWord: "tired",
    translation: "zmęczony",
    baseKey: "pl",
    targetKey: "en"
};
add (word8);


var word9 = {
    baseWord: "scared",
    translation: "przestraszony",
    baseKey: "pl",
    targetKey: "en"
};
add (word9);



var word10 = {
    baseWord: "worried",
    translation: "zmartwiony",
    baseKey: "pl",
    targetKey: "en"
};
add (word10);



remove(word9);


function add(word){
    dictionary.push(word);
    //test.push(word);
}

function remove (samolot){
    dictionary.forEach(function (el,ind) {
        if(el===samolot){
            dictionary.splice(ind,1);
        }
    });
}

function getRandomWordFromDictionary() {
    var randomKey = Math.floor(Math.random() * (dictionary.length));
    return dictionary[randomKey];

Chciałbym żeby wylosowane słowa się nie powtarzały...chciałbym żeby do nowej zmiennej sklonować wylosowany już obiekt i usunąć z tablicy obiekt o wylosowanym kluczu...pomoże mi ktoś?