quartet
foursome
tetrad
quadruplet
quatern
Ally
Arid is another word for extremely dry.
A lot of people.
I would say that another word for quadrangle would be quadrilateral. Literally, quadrangle means four angles, just as triangle means three angles. So if you were classifying plane figures by sides and angles, that might work. A convex figure with four sides would have four angles.
The four letter word that means, "I forbid," is veto.veto
Muslim Ummah, which means the Muslim nation.
The word sociable means to like the company of other people.
The word that means from another country is "foreign."
Another word that means spirit is ghost
It means four.
Tetrad means a group of four. It is derived from the Greek word "tetra," which means four. In various contexts, tetrad can refer to a group of four related things or elements.
Connect four.