• cookines,
• goodiness,
• bookisness,
• knotiness,
• hookendess,
• pokiness,
• korkiness,
• jookiness,
• mookiness,
• lookiness,
• oookiness,
• iookiness,
• kookoness,
• kookiness,
• kookinses,
• kookyness,
• booginess,
• koomisss,
• knobiness,
• suitiness

The adjective form of the word "kookiness" is "kooky".

The plural form of "kookiness" is "kookinesses".

The plural of the "kookiness" can be the "kookiness".

The singular form of the word "kookiness" is "kookiness". It is already in its singular form.

The singular of the "kookiness" can be the "kook".