Cool as cucumber and Tongue-tied

Tongue-tied and cool as cucumber are semantically related. in without ability to talk topic. In some cases you can use "Tongue-tied" instead an adjective phrase "Cool as cucumber".

Tongue-tied adjective - Unable to express yourself clearly or fluently.

Cool as cucumber and tongue-tied are semantically related. Sometimes you can use "Cool as cucumber" instead an adjective phrase "Tongue-tied".