Call upon and Send for

Send for and call upon are semantically related in demand topic. In some cases you can use "Send for" instead a verb "Call upon", when it comes to topics like call to a place.

Send for verb - Order, request, or command to come.

Call upon and send for are semantically related in demand topic. Sometimes you can use "Call upon" instead a verb "Send for", if it concerns topics such as call to a place.