The two words are sign and glory. Both of those words are in the reading for today. At first glance sign appears to be synonymous with miracle. The changing of water into wine, the healing of an official's son, the feeding of the five thousand are all called signs. We tend to hear miracles, but I don't think that is what John intends.
Miracles tend to draw attention to the person who is doing the miracle.
When there is someone with special abilities or gifts, like an Edgar Cayce or a Nostrodomus then the miracles are all about them. We remember them because they were unique people with special powers. John uses the term signs because what Jesus is doing points to something else. The signs are not about Jesus, they are about what God is doing. Jesus is not just a miracle worker, someone who will come and go, he is the messiah, someone for whom Israel had waited, someone promised by God.