如何连接两个没有相同单词的字符串

I am trying to connect two string that hasn't same word for matching game. I've the code that, I've create, work with same text. For example if first pick = "word1" the second pick must has same text "word1".I want first pick = "word1" and second pick = "definition1". Please help for more details see the code below .I am trying to connect two string that hasn't s