Blue-sky and Unachievable

Blue-sky adjective - Without immediate commercial value.

Unachievable and blue-sky are semantically related. In some cases you can use "Unachievable" instead an adjective phrase "Blue-sky".

Unachievable adjective - Impossible to achieve.

Blue-sky and unachievable are semantically related. Sometimes you can use "Blue-sky" instead an adjective "Unachievable".

Nearby Word: unachieved