To bring separate findings into one account that holds them all. Synthesis adds the joining, which is real work.
From synthesis, Greek σύνθεσις (a putting together), from syn (together) + tithenai (to place); bringing separate findings into one holding account is the verb form of the same old act of composition.
Bringing separate findings into one account that holds them all. The joining is real work, added by the act of synthesis rather than found already there.