different between saplessness vs soaplessness

English

sapless +? -ness

saplessness (uncountable)

soapless +? -ness

soaplessness (uncountable)

The state or condition of being soapless; lack of soap; hence, uncleanliness.
- 1884, The English household magazine (page 31)
  In the common kitchen, you may see them grouped picturesquely enough, but with an unsavoury monotony of soaplessness […]
- 1931, The Week-end Review (volume 3, issues 43-68, page 433)
  One poor devil, unused to ragging, and reproached with soaplessness, went out and shot himself in the area, and at our library table a Suicide Club or pact (anterior to Louis Stevenson's) was solemnly formed.

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