… it rather depends on your 'clination, Brian
MichaelG.
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P.S. There is a subtle distinction, but like with many words, it has become eroded.
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Edit: according to wikidiff.com …
Inclinometer is a synonym of clinometer.
As nouns the difference between inclinometer and clinometer
is that inclinometer is an instrument that displays the angle of an aircraft relative to the horizon while clinometer is an apparatus for measuring a vertical angle, a slope, or the height of a large object (eg a tree).
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But would you trust anyone who doesn't understand the meaning of 'synonym' 
Edited By Michael Gilligan on 18/08/2019 18:10:25