Singular of Hypnosis is Hypnosis

[kobaj]

const pluralize = require('pluralize');
console.log(pluralize.singular("hypnosis")); // hypnosi

[cirosantilli]

Yes, everything that ends in -osis, -esis, -ose is broken. These are important greek suffixes, and appear widely in scientific nomemclature. Tuberculosis, basis, endosymbiose, electrophorese, apoptosis, etc.

One thing that is particularly bad is that in those cases, pluralize 1 vs 2 does not do the reverse operation:

> pluralize('tuberculosis', 1)
'tuberculosi'
> pluralize('tuberculosis', 2)
'tuberculoses'
> pluralize('tuberculoses', 2)
'tuberculoses'
> pluralize('tuberculoses', 1)
'tuberculose'
>

so we have tuberculosis 2 -> tuberculoses and tuberculoses 1 -> tuberculose.

"pluralize": "8.0.0".