How to spell ACUSTOMNESS correctly?

The correct spelling of "acustomness" is actually "acquaintance". Although "acustomness" might seem like a plausible word, it doesn't exist in the English language. If you meant to refer to familiarity or knowledge of someone, "acquaintance" is the term you were looking for.

• acuteness The doctor commended the patient for recognizing the acuteness of their symptoms and seeking immediate medical attention.
• customers The store strives to provide exceptional service to its customers.

Delecate

• dedicate
• delegate
• delegated
• delegates
• delete
• delicate
• relegate
• relocate