• troley,
• crowely,
• crowdy,
• crwled,
• crowled,
• crowly,
• crokey,
• crowel,
• rowly,
• cruley,
• crewlty,
• croney,
• crudley,
• roley,
• croly,
• crouly,
• crowbery,
• crownles,
• crowler,
• crowflwer

• creole,
• croley,
• cruel,
• creel,
• croyle,
• crawley,
• Crull,
• Creola,
• crawl,
• Crowell,
• crowl,
• criollo,
• croll,
• Crail.

The plural form of the word "Crowley" is "Crowleys".

The singular form of the word "Crowley" remains the same - "Crowley". It is already a singular proper noun and doesn't change when referring to one individual.