pleonasm

pleonasmi, liikasanaisuus puhekieltä redundancy Redundancy, repetitiveness, and superfluity in wording.
1993, Anthony Burgess, A Dead Man in Deptford,

My salvation is in my Saviour who saveth me hence the redundancy and pleonasm of my asseveration.

"The two of them are both the same" is a pleonasm (as the word "both" is redundant), as is the phrase "killed dead".