The term ALLEY OOP KINGDOM is composed of seven crossword solutions: MOO (3 letters), OOOLA (5 letters), CAVEMEN (7 letters), CAVEMAN (7 letters), CAVE (4 letters), OOLA (4 letters), and CLUB (4 letters). MOO is a sound made by cows, OOOLA is a character from the comic strip 'Alley Oop', CAVEMEN and CAVEMAN refer to primitive humans, CAVE is an underground space, OOLA is another character from the comic strip, and CLUB is a weapon used by cavemen. Together, these words form the term ALLEY OOP KINGDOM, which is the fictional kingdom in which the characters from the comic strip live.