• danboyish,
• canboyish,
• vanboyish,
• ganboyish,
• tanboyish,
• ranboyish,
• fznboyish,
• fsnboyish,
• fwnboyish,
• fqnboyish,
• fabboyish,
• famboyish,
• fajboyish,
• fahboyish,
• fanvoyish,
• fannoyish,
• fanhoyish,
• fangoyish,
• fanbiyish,
• fanbkyish

• fabulous,
• fanciful,
• annoying,
• fashionable,
• ambiguous,
• abominable,
• frivolous,
• Atomish,
• frenzied,
• famished,
• Familiar,
• fanatic,
• admirable,
• foolish,
• agonizing.

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

The plural form of the word "fanboyish" is "fanboyish" as it is an adjective and does not change in plural form.

The singular form of "fanboyish" is "fanboy"