Both "annualised" and "annual" function as an adjective.
What is the difference between them?
Annualized is a financial term meaning that a figure has been changed from one number to another number (using math) in order to show the yearly rate instead of some other rate (daily, monthly, quarterly).
Annual means "yearly" or every year. You can have an annual festival or an annual meeting.
Annualized is a finance word. Annual is more often used in normal vocabulary. You're more likely to use "annual" than "annualized," unless you're in finance.