union

[1]	uniting , labor union , trade union , unity , combining , trades union , brotherhood , combination , joining , junction , conjoining , conjunction , allying , alliance , associating , association , coalition , amalgamating , amalgamation , fusing , fusion , marrying , marriage , confederating , confederation , confederacy , synthesizing , synthesis , mixing , mixture , federation , togetherness
[2]	alliance , North , association , organization , society , circle , fraternity , club , fellowship , team , ring , gang , syndicate , coalition , party , confederation , confederacy , federation , Bund , league , consortium , bloc , cartel , trust
[3]	joint , coupling , mating , seam , splice , pairing , conjugation , junction , conjunction , sexual union , graft , weld , coupling
[4]	agreement , unification , accord , harmony , harmoniousness , congruity , coherence , compatibility , unanimity , unity
[5]	marriage , matrimony , spousal relationship , wedlock
[6]	conglutination
[7]	sum , join
[8]	unification , uniting , conjugation , jointure

adj.

[1]

Federal