Synonyms for Bed down:

n.

down, collapse, hunker down, put up, fall, lay, curl up, bunk, flop, cuddle up, house, quarter, accommodate. rest, retire, sleep, lie, turn in, hit the hay. bed down (noun)
bunk down.

v.

body (verb)
bunk down.
settle (verb)
flop, lay.
sleep (verb)
hit the hay, rest, turn in, retire, bunk.

Other synonyms:

curl up, cuddle up. collapse, bunk, flop. lay, lie. fall. down. Other relevant words:
quarter, retire, accommodate, rest, turn in, sleep, curl up.