Blue-sky and Half-baked

Blue-sky adjective - Without immediate commercial value.

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

Half-baked adjective - Showing or marked by a lack of good sense or judgment.

Blue-sky and half-baked are semantically related. Sometimes you can replace phrase "Blue-sky" with "Half-baked", this phrases are similar.