Synonyms for Coda:

n.

completion, ending, withdrawal, end, passing, closure, expiry. arpeggio, crescendo, flourish, descant, excerpt, counterpoint, breakbeat, cadence, accompaniment. annex, blank, foot, box, contents, attachment, attention line, annexe, amendment. coda (noun)
finale.
communication (noun)
finale.
epilogue (noun)
postscript, sequel, ending, Postlude, finale, follow up.
sequel (noun)
afterthought, outcome, codicil, epilog, descendant, follow up, consequence, postscript, offspring, Postlude, posterity, legacy, sequel, aftereffect, effect, outgrowth, aftermath.

Other synonyms:

annex, breakbeat, accompaniment, arpeggio, cadence, descant, annexe, attention line, counterpoint, excerpt. flourish, foot, amendment, crescendo. blank. attachment. box. Other relevant words:
counterpoint, withdrawal, accompaniment, ending, foot, blank, crescendo, end, contents, annexe, descant, flourish, cadence, excerpt, finale, attachment, passing, annex, expiry, amendment, breakbeat, completion, closure, box, arpeggio.