yes and I think yours is right 

 Nah…….stir
….sir 

 I know a few people that say know-stir. they are wrong.  

 I say Nostr like No Sir because of the whole “notes” parts. 

 Valid point! 

 Ah, now I see it. 

 What about  nawww-store? 

 Consider the word "nostrich".  Sounds like ostrich.

There's your correct pronunciation.

nostr:note1pv4aepwe8zn5exn86zm4vfzfhtr44sqgsspt2ynq7al3pucm7yrqhng9vk  

 You are saying it correctly  

 Nooh ster

Like 

🐓 

 There is only one way to pronounce and it’s : Nostr-damus 

https://media.tenor.com/wRpPNG_pmYQAAAAC/negrodamus-chappelles-show.gif 

 One of the many vagaries of English pronunciation. Nostr is caught in the crossfire between ghost, host, most and post and cost, dost and lost.  The closest words are all pronounced with the short o, like coster, foster, roster and zoster (the only outlier being poster). I don’t think there’s a right answer but would lean towards the short o. What does @fiatjaf say? 

 Some favor the long o from notes, others the short o from other stuff. But if someone showed me the new wort nost, it would be highly ambiguous in my head. 

 It maybe a function of where you’re from too. Unless I’m mistaken, don’t Americans say nōstradamus while the Brits say nǒstradamus? 

 Good point. I’ve always said long o Nostradamus.