I used to play this one on Gaia!

Player 1 - POSTS A TABOO LETTER
Player 2 - POSTS A WORD WITHOUT THE TABOO LETTER, -and- A NEW LETTER
Player 3 - POSTS A WORD WITHOUT THE TABOO LETTER, -and- A NEW LETTER
And so on and so forth.

Let's start wiiiith:
TABOO LETTER = L

theme, T

HEARING,

J

pestilence, I

Penance

O

Ambience, E

faith, A

energy, e

Fly, F

painting

d

Ergonomic, O

Yarn, a

microphone, R

banana, a

monitor, t

visionary, i

octopus, P

TIRED, N

drowsy

U

Sleeping, e

drool, R