Answer:

federate

Answer	Crossword Clue
FEDERATE	Unite, in a way
FEDERATE	Form a league.
FEDERATE	Unite

FEDERATE	Join forces
FEDERATE	Join states
FEDERATE	Unite into a league
FEDERATE	Form a league
FEDERATE	Form into a league or union

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.