Send-off and Turn down

Send-off noun - An organized expression of goodwill at the start of a trip or new venture.

Turn down and send-off are semantically related. In some cases you can use "Turn down" instead a verb phrase "Send-off".

Turn down verb - To show unwillingness to accept, do, engage in, or agree to.

Send-off and turn down are semantically related. Sometimes you can replace phrase "Send-off" with "Turn down", this terms are similar.