"Missed Approach" is the procedure and is defined; "go around" is not - so there is not much basis for some of the above. Therefore - IMO - "go(ing) around" ought to be kept as the ATC instruction and pilot call/reaction (q.v. the use of the terms "take-off" or "departure" - to avoid misunderstanding). However, unfortunately, the latter is in widespread aircrew use in the same sense as missed approach.
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