• blackbery,
• blachboard,
• lackboard,
• blackobard,
• blakboard,
• blacboard,
• blackboarda,
• blackboad,
• blackbord,
• blackoard,
• blackboars,
• blackbard,
• blackbaord,
• blackboar,
• blackboared,
• blckboard,
• blaclboard,
• blackbean,
• black beard,
• blackbead

• black belt,
• blackbuck,
• blackcap,
• blackbird,
• Black African,
• black bee,
• blackbeetle,
• black person,
• blackball,
• blackface,
• black bass,
• Black Africa,
• black bean,
• blackbody,
• blackford,
• black pepper,
• black apricot,
• black bear,
• black bream,
• blackfriar,
• black pea,
• black bead,
• black friar,
• blackberry,
• blackburn,
• blackboard,
• black bread.

The adjective form of the word "blackbeard" would simply be "blackbearded".

The plural form of "blackbeard" is "blackbeards".

The singular form of the word "blackbeard" is "blackbeard".