• catman,
• cataman,
• katman,
• catmen,
• cattman,
• xat man,
• vat man,
• fat man,
• dat man,
• czt man,
• cst man,
• cwt man,
• cqt man,
• caf man,
• cag man,
• ca6 man,
• ca5 man,
• cat nan,
• cat kan,
• cat jan

The adjective form of "cat man" would be "cat-like" or "feline".

The plural form of "cat man" is "cat men"

The singular form of the word "cat man" is "cat man" as it already refers to a singular individual.