Very high on the list of words I only know because of crosswords: the answer is "stoa".
Stoa
A portico or covered colonnade could be called an arch.
The four letter word that means, "I forbid," is veto.veto
The four letter word is dawn.
Exit
A four letter word meaning the foundation of something is base.
Rend is a four letter word that means to tear into pieces. Tear is also a four letter word meaning to pull apart.
The word is scam.
Kiss.
huge
stun
tall