You asked in your initial post:
"If a word.com has 10k~100k /100k~1M google search per month in US. How much it should be?"
But "bultery" is not a word, it is not a keyword domain name.
Here is what "word" means:
https://dictionary.cambridge.org/dictionary/english/word
word, noun: a single unit of language that has meaning and can be spoken or written
When you claim that you have a "word.com", or a keyword domain name, then that means that your domain name contains an actual word. A word is a
single unit of language that has meaning and can be spoken or written.
And here is what language means:
https://dictionary.cambridge.org/dictionary/english/language
a system of communication consisting of sounds, words, and grammar
a system of communication used by people living in a particular country
Well in theory you could invent your own language and then invent words for that language, but then no one will buy those invented random garbage words as domains.
So you would better use words from existing languages, such as from the English language.
You can find an English dictionary (which contains the words from the English language) here:
https://dictionary.cambridge.org/dictionary/english/
If you cannot find a word here, then that means that word is not part of the English language.