• innumrable,
• innumbrable,
• innumborable,
• inumbrable,
• inunmberable,
• innumbearble,
• innumberble,
• inumberable

• incalculable,
• vast,
• copious,
• boundless,
• unnumbered,
• immeasurable,
• innumerable,
• countless,
• endless,
• multitudinous,
• limitless,
• myriad,
• indefinite,
• incognizable,
• infinite.

The adjective form of the word "innumberable" is "innumerable".

The plural form of the word "innumerable" is also "innumerable" as it is an adjective that does not change when used in the plural form.

The singular form of the word "innumberable" is "innumerable"