Synonyms for Patch up:

n.

bandage, anaesthetize, bleed, anesthetize, attend, catch, bring back, bypass, cauterize, catheterize. compromise, buckle, break up, call off, bridge-building, arbitrate, concede, concession. do up, overhaul, darn, maintain, fix up, mend, heel, heal, fix. appease (noun)
adjust.
patch up (noun)
reconcile, patch, make up, conciliate, settle.

v.

change (verb)
patch.
settle differences (verb)
adjust, settle, conciliate.

Other synonyms:

adjust, mend, heal. Other relevant words:
arbitrate, overhaul, adjust, heal, do up, mend, fix up, fix, darn.