A is for Assassination. James T. Kirk prevented one from being inflicted on the Federation President at the Khitomer Peace Conference in 2293.
B is for Bum. Reed admired T'Pol's.
C is for Cat. Sylvia turned into one and Gary Seven owned one...though neither one was a real cat.
D is for double dumb-ass, what Kirk called the cabbie in TVH.
E is for Eyemorg. Kara and Luma were Eyemorg. Hot
F is for fractured dylithium chrystals. Which almost stranded Kirk and co in the 20th century.