Genuinity ?

[ph2004]

Can one say " I am not sure about the genuinity of this Windows program ? Is this a correct word ?

[bhaisahab]

Can one say " I am not sure about the genuinity of this Windows program ? Is this a correct word ?

No, it is not a word, use "authenticity".

[BobK]

No, it is not a word, use "authenticity".

I've heard (and used), and seen in some dictionaries, 'genuineness' (pronounced with a brief hiatus between the /n/ of 'genuine' and the /nəs/) . But not every one is happy with it, and it's safer to do as bhaisahab suggests - particularly as this is the word Microsoft use in this context ('Certificate of Authenticity').

b