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

african

letter: i

ottawa

E

nails

Letter: B

Orange

s

curfew

W

understand

i

WED

S

prodigy

I

Dog, a

eternity

T

Yellow,

Y

health  a

resin, J

vixen, N

SWIM, S

equator, A

little, L

cat, k

catastrophe, O

class - R