Bedrail

3 clues
Footboard-headboard connector
Where to get tied up during S&M
Safety feature that eases a child's transition from a crib
Similar answers:
Abed
Abedandtroy
Abednego
Abedof
Abedofroses
Abedtimestory
Absorbed
Adambede
Adlibbed
Adsorbed
Airbed
Airbeds
Aislebedarned
Albedo
Albedos
Alpinetrail
Altarrail
Ameliabedelia
Anamericantrail
Andsotobed