The crossword solution for the term 'abound or swarm' is TEEM, which is a four-letter word. TEEM is a verb that means to be filled with a large number of people or things. It can also mean to move in large numbers. The term is often used to describe a place or situation that is full of activity or life. Abound and swarm are both synonyms of TEEM, and they all refer to a large number of people or things.