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The pronunciation of any word in English (or any language at all) is not Universal.  This is because there are many different dialects of The English Language — both throughout America, and also world-wide.  The pronunciations that are presented on GiveMeSomeEnglish!!! are based-upon a combination of both “common usage”, and the most neutral accent used in The International Common Tongue — a.k.a. “American English”.
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Authorization – For this word:  the “Au” combination is pronounced like the “Aw” combination;  the “th” combination is un-voiced;  the “o” disappears;  the “i” is long;  the “a” is a Long “A” / Long “E” Diphthong;  and for the “-tion” suffix – the “ti” combination is pronounced like the un-voiced “sh” combination;  and the “o” is pronounced as an i-schwa (this is the standard pronunciation of this suffix in The Common Tongue).

– /aw-th’r-ai-ZAY-shihn/ – /ˌɔ.θɚ.aiː.ˈzeiː.ʃə(ɪ)n.z/ – Notice also that there is a minor stress on the first syllable and that the major stress is on the fourth syllable –

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Learn More About The Word “Authorization” On Wiktionary

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