Definition of spuriousness in English:

spuriousness

noun

See spurious

‘They were laughably crude with obvious misspellings and badly formed HTML, often directing receivers to poorly drawn counterfeit web sites that gave many visual and technical clues to their spuriousness.’
‘The spuriousness of his Hebrew etymologies suggests, but does not prove, that he did not know Hebrew.’

Pronunciation

spuriousness

/ˈspjʊərɪəsnəs/