The term 'deliriously happy' can be described by four crossword solutions: EUPHORIC (8 letters), ECSTATIC (8 letters), OVERJOYED (9 letters), and highasakite (11 letters). Euphoria is a feeling of intense happiness or joy, while ecstasy is an even more intense feeling of joy. OVERJOYED is a feeling of great joy or delight, and highasakite is an informal expression for being extremely happy. All of these words describe a state of extreme happiness or joy.