1. Without flavour.

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

• flavourless,
• flavoless,
• flavoress,
• flavorless,
• dlavourless,
• clavourless,
• vlavourless,
• glavourless,
• tlavourless,
• rlavourless,
• fkavourless,
• fpavourless,
• foavourless,
• flzvourless,
• flsvourless,
• flwvourless,
• flavurless,
• fllavourless,
• flovourless,
• flovorless

• flavoursome,
• flavorlessness,
• flavorless,
• flavouring,
• flavoured,
• flavorful,
• flavorsomeness,
• flavorsome,
• flavourer,
• flavourful,
• flavorer,
• flavourous,
• flavorous.

The adjective form of the word "flavourless" is "flavorless" (American English) or "flavourless" (British English). Both spellings are correct and refer to the absence of taste or flavor.

The plural form of the word "flavourless" is "flavourless." The word does not change when pluralized.

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