Joining

parabiosis

the uniting of two individual organisms or animals anatomically and physiologically, either under experimental or natural conditions. —parabiotic, adj.

symphytism

Rare. coalescence; union or fusion.

synartesis

1. a close joining together.

2. the state of being fastened or knitted together.

synthesis

1. the process of putting two or more things, concepts, elements, etc., together to form a whole.

2. the whole formed of such combined parts. See also thinking. —synthesist, n., —synthetic, synthetical, adj.

syntheticism

the principles or practice of synthesis or synthetic methods or techniques.

synthetist

a person who practices or believes in synthetic methods or principles.

systasis

Obsolete, a union, especially a political union as a federation or alliance.