>I've seen 'watched threads' or 'tracked threads' mostly.

Using it with two words would provide a better representation of its option. I just do not know where to put it.

One thing that we could consider is to remove the Agent icon from the upper toolbar. That one is difficult to understand, as is, for new members. Thus, in there would remain Refresh, Replies, Private messages and Users online. The Agent could be moved to Toolbox as a dropdown list control, such as Time warp. So, the dropdown list control would be Agent and would offer "Watched threads", "Word searching", "Subscribed users". We would also need to adjust the terminology "Marked threads" to "Watched threads", wherever it applies. In the Dashboard, also, we could provide the ability to show the last 10 marked threads, with the ability to turn it ON or OFF, with expand ON or OFF, such as we have for other related options, such as Online users, Offline users, etc.

But, this makes me thing about some members who put 0 in the width of the toolbox last week to avoid it being shown. I recommended not to do that as for new options, such as this potential one, they wouldn't see it. I would also probably force the validation of a minimum width of the toolbox to always be in effect and adjust those who put it to 0 to have it to the minimum.