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Phthisis
A wasting or consumption of the tissues. The term was formerly applied to many wasting diseases, but is now usually restricted to pulmonary phthisis, or consumption. See Consumption.
The act or process of consuming by use, waste, etc.; decay; destruction.
oewn 202368% interchangeable
Open English WordNet places these words in at least one shared synset. They share a lexicalised sense, but context, register and collocation should still be checked before substitution.