In article k.net,
says...
Abe wrote:

Helo engines are usually referred to as "turboshaft", which aside from
sounding suspiciously like a porn film, is possibly just another name
for a turboprop.

A turboprop engine is configured so the output shaft will
mount a propeller. It has thrust bearings and is geared to
drive a propeller directly.

A turboshaft delivers its output to a shaft which may be
connected to nearly anything except directly to a propeller.

I'm a bit hazy on the difference here. Are you saying a turboprop has
no reduction gearing between engine and propellor?

If it does have gearing, then I'm not sure of the clear-cut difference
between that and a more complex transmission. Could you elaborate?