different between uneasiness vs perplexity

English

From uneasy +? -ness.

uneasiness (countable and uncountable, plural uneasinesses)

The state of being uneasy, nervous or restless.
An anxious state of mind; anxiety.
- 1860, Charles Dickens, Great Expectations
  Finding that the afternoon coach was gone, and finding that his uneasiness grew into positive alarm, as obstacles came in his way, he resolved to follow in a post-chaise.

perplex +? -ity, from Middle French perplexité or post-classical Latin perplexitas ‘entanglement’, from perplexus.

perplexity (countable and uncountable, plural perplexities)

The state or quality of being perplexed; puzzled or confused.
Something that perplexes.
- 1942, Rebecca West, Black Lamb and Grey Falcon (Canongate 2006), page 149:
  The Emperor, who was by then a focus of unresolvable perplexities, stood providing a strongly contrary appearance.
In information theory, a measurement of how well a probability distribution or model predicts a sample.

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