Green as grass and Wide-eyed

Wide-eyed and green as grass are semantically related In some cases you can replace phrase "Wide-eyed" with "Green as grass", this phrases are similar.

Wide-eyed adjective - Lacking in worldly wisdom or informed judgment.

Green as grass and wide-eyed are semantically related in innocent topic. You can use "Green as grass" instead an adjective phrase "Wide-eyed".