Thoughts in the text - a direct occurrence of the case of the keyword in the domain for promotion?

Question

Search Engine Optimization

Hello!
I'm trying to deal with the occurrence of keywords in the domain itself, or rather with its declension
. Let's say in the search they write: "Buy an elephant in Moscow"
Domain options:
1. slon77 . ru
2. elephant77 . Common crawl en
As for me, it would be correct to specify the second option, it has an exact match with the keyword
At the same time, the first option is shorter
But search engines also know how to determine cases, you can write to them

"elephant"

, and they will give out both "elephant", "elephants" and "elephants"
What can you say about this, who has any practices, who can share their experience?
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There is no one to talk to on this topic, I am writing here ((
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Edit 2:

Yes, I know that this is a small part, it will be more important for a search engine to get a 100% optimized site and a core with a thick site than one domain.
I learned to optimize 100%, reloading and other crap everything is being done, now I'm bothering with such trifles, because I have already done everything else

Answer 1

Search engines take into account the presence of a key in the domain.
The fall is not important.
By the way, you can even write in English, they will understand.
But it's one of 100,500 factors, so don't worry too much about it.

Answer 2

domains ran out before 2010
can be practically ignored

Answer 3

In the above example, it is better to do for people. Who knows what an elephant is? What's an elephant? Killed or fed?
But elephant is clearer.

Answer 4

Entering a domain can influence a narrow niche . Accuracy is not required here, for example , this article shows that a site with the kovrolin domain ranks well for queries with "carpet" and "carpet", but poorly for "carpets". But in the niche of apartment renovation, a site with the remont entry in the domain is inferior to more trusted sites.
First you need to optimize everything else, and the domain will go as a plus factor. If you plan to focus only on "elephants", then you can try, and the occurrence of slon will suffice .