I will give an answer that you probably don't want to hear.1)
While I think it very admirable that you want to compliment others for their code, I think you should only give out compliments on code if you can actually read and judge it yourself. Otherwise, it can't really be an honest compliment, and I'm almost sure people will eventually notice.
Instead of learning complimentary adjectives by rote, read the code and choose adjectives that actually match the code. I dare say if you are, or have been, a programmer for some time, this shouldn't be too difficult.
1) I don't mean to give any offense by this answer. It really only applies in the specific case where you'd compliment code with adjectives such as clean, elegant, well-structured, reduced to the max, etc. etc. without actually having looked at it closely.