It is a matter of semantics..

No two different things are ever 'the same'.

They are 'similar' it depends how much detail you want to go into.

Simply put..the inputs are the same ...the out puts are different.

Wind drives them both...a 'Mill' grinds or mills something. A turbine.... presumably is going to generate electricity.

I'll let you figure out the bits in between.

Del

Del,

I had thought of turbine as being like a gas turbine or steam turbine - many blades on a set of discs that rotate wehn appropriate gasses pass through them. And that tall thing with rotating blades that generates electricity as a wind generator (equally inappropriate phrase - it does not generate wind.) Feeling lost in the semantics I looked it up in Wikipedia, and found the following:

Wind turbine

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Wind turbines near Aalborg, Denmark. For scale, a standard doorway can be seen at the base of the pylon.

A wind turbine is a rotating machine that converts the kinetic energy in wind into mechanical energy. If the mechanical energy is used directly by machinery, such as a pump or grinding stones, the machine is usually called a windmill. If the mechanical energy is then converted to electricity, the machine is called a wind generator, wind turbine, wind power unit (WPU) or wind energy converter (WEC).

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It is always good to improve ones education and knowledge. Thanks.

A windmill, traditionally, is a wind-powered device that is used to mill grain. This one has 4 sails:

A wind turbine is a wind-powered device that makes electricity. This one has three blades: There are similarities.

In SA (I think OZ as well) the word windmill is also used for a wind driven reciprocating bore hole (bore well) pump.