1. There you go 'misreading' what I wrote again. For a bright bloke you do it quite a lot. The list you refer to was to illustrate all the different names you use to describe what other people might call 'chemtrails'. And, if you read other stuff I've written then you'll understand that the issue people have is the behaviour of these trails (expansion to create artificial cloud cover), their relatively recent proliferation, the absence of any meaningful debate about it.
Well, you concluded that list with "names for something that already has one: cloud.", so what was I misreading?
2. Did I have another difference between clouds and contrails in order to establish once and for all that contrails are not clouds? One might refer to a contrail as a cloud as one would a cloud of flys, or a cloud of smoke - neither of these is a cloud, strictly speaking. The word 'cloud' is used as a figure.
A contrail is a cloud of ice crystals, a cirrus cloud is a cloud of ice crystals. We are not talking about clouds of flies or sand. We are talking about clouds of the exact same substance.
The main difference is this - one is an adiabatic cooling process, and the other is an adiabatic and isobaric mixing process. The important elements of contrail formation are the characteristics (temperature and RH) of the two air masses being mixed, and the pressure at which this happens. So it's not quite the same as for clouds. The commonality is phase changes of water. They are similar but distinct.
(Explanation for anyone following:
adiabatic cooling is reduction in temperature of a gas when its pressure drops. Simply put, as warm moist air rises, it's pressure drops with altitude, and so it cools. The same thing happens on a much faster and more violent scale with the hot moist air from jet exhaust. Isobaric mixing is just the mixing of two volumes of air at constant pressure. After the jet exhaust has expanded to match the ambient pressure, it continues to turbulently mix with the surrounding ambient air until it reaches the same ambient temperature and humidity. There's also isobaric cooling, which is when an air mass cools via radiation.)
Isobaric mixing
is a part some natural cloud formation processes, mostly fog type clouds though. But anywhere there is turbulence (which is basically everywhere, to some degree) there will be some isobaric mixing.
But yes, they form differently. One is formed from the mixing humid air shot out the back of a jet engine at 5000 mph, at 3000 degrees. Obviously they differ in their initial circumstances. But the end result is about the same.
I'm really not sure what your problem is here? You just don't like the word "cloud" being used for contrails, because it's not official terminology? Fine, let's call them contrails. But what about aviation induced cloudiness? Is there no point at which the contrail cloud of ice crystals could now be considered a cloud cloud of ice crystals? Are you just complaining about terminology? What's your point?