• locbox,
• lockboxes,
• llockbox,
• loxbox,
• kockbox,
• pockbox,
• oockbox,
• lickbox,
• lkckbox,
• llckbox,
• lpckbox,
• l0ckbox,
• l9ckbox,
• loxkbox,
• lovkbox,
• lockboc,
• lockbx,
• lochbox,
• lockfoco,
• Voisbox

• look back,
• logbook.

The adjective form of the word "lockbox" is "lockbox". It does not change when used as an adjective.

The plural of the "lockbox" can be the "lockboxes".

The singular of the "lockbox" can be the "lockbox".