c＃regex如何将用户的输入与单词/短语数组相匹配

I have an array with different words and phrases. The user will input a spam message and I'm supposed to check whether there are any matches to the words and phrases already in the array. For each match the score will +1 and if the score is more than 5 then the possibility of it being a spam message is Yes.I have an array with different words and phrase