Several words and phrases can express appreciation, such as "thank you," "value," "treasure," "you’re the best," "your thoughtfulness will always be remembered" and "words cannot express how you have helped." Synonym.com provides synonyms for the word appreciate, and Wow4U.com and Grammar.YourDictionary.com both provide phrases to express appreciation.
Expressions of appreciation range from expressing appreciation to a casual acquaintance or professional colleague to expressing appreciation to a loved one. For example, “you do a great job” is an appropriate expression of appreciation for a co-worker, while, “your love and support will always be remembered” is an expression suitable for a friend or family member. Grammar.YourDictionary.com provides casual expressions of appreciation, quotes of appreciation and expressions of appreciation for relationships.