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

Surf, R

Quiet, A

Groom, o

Turtle, R

Fail, a

Lonely, L

Thunder, T

YET, E

Conference, E

Plum, u

Library, A

Terror, E

Lightning, G

Slide, s