free-standing, sunken
cast-iron, tin

fill
lie in, soak in

faucet (AmE), tap (BrE)
bath taps (BrE)
bathtub faucets (AmE)

in the bath
I'm in the bath! (BrE, AmE)
I'm in the bathtub! (AmE)

hot, warm
cold
long
quick
luxurious, nice, relaxing, soothing
bubble, mud, steam, Turkish
I lay soaking in a hot bubble bath.

bed (BrE), blanket (BrE), sponge (AmE)

draw (AmE), prepare (AmE), run
Could you run a bath for me?

have (esp. BrE), take (esp. AmE)
give sb
need

mat, towel
oil, salts
time
It's the children's bath time.