1. Stupid; dull.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• blockheade,
• blockhaed,
• blockhead,
• vlockheaded,
• nlockheaded,
• hlockheaded,
• glockheaded,
• bkockheaded,
• bpockheaded,
• boockheaded,
• blickheaded,
• blkckheaded,
• bllckheaded,
• blpckheaded,
• blockheadded,
• blokheaded,
• blockheded,
• blockheadde,
• blochheaded,
• blokheded

• blockade,
• blockading,
• blockhead,
• blackhead,
• blockaded.

The adjective form of the word "blockheaded" is "blockheaded".

The plural form of "blockheaded" is "blockheadeds". However, it is worth mentioning that the word "blockheaded" is not commonly used, so its plural form is rarely needed.

The singular form of the word "blockheaded" is "blockhead"