Synonyms for Let go:

n.

let go (noun)
relinquish, release, let go of.

v.

abandon (verb)
desert, surrender, drop, discard, leave, vacate, abdicate.
acquit (verb)
release.
can (verb)
dismiss.
contact (verb)
relinquish, release, let go of.
deliver (verb)
abandon.
rid (verb)
forgo, dispose, vacate, disclaim, abandon, renounce, surrender, dismiss, reject, leave, part with, capitulate, desert, release, shed, forsake, jettison, relinquish, abdicate, dispel, vent, drop, disown, rid, waive, relegate, discard, cancel.

Other synonyms:

acquit
release.
leave
leave.
Other relevant words:
let go of, abandon.