A. Aquiel Uhnari
B. Bun, Janeway wore her hair in one.
D. Distress (The crew of the Enterprise was in this state)
E. Exothermic Reaction
F. Faaaaaaaaaaaaaaake!!, it's a
H. Harry Mudd
I. Iotians - from the TOS episode "A Piece of the Action". The Iotians inhabit the planet Sigma Iotia II.
J. J25, System. As featured in "Q Who"
L. Lizard (Charlie X turned that girl into one)
M. Minsharra Class Planet
(One of these days M won't be 'Minsharra Class Planet')