Domain for seo

For seo reason, which combination is better for domain name? is aaaaa-bbbbb.com, aaaaa_bbbbb.com or aaaaabbbbbb.com?

 

aaaaa_bbbbb < is this kind allowed? :-? by the way, i prefer aa-bb.com. it's going word by word and easily be read and recognizable by anyone and most importantly, the search engine. we're here to make money right? so, be wise.

 

if you Google aaaaa bbbbbb, aaaaa-bbbbbb will show up as that.. so "-" is better in SEo terms

 

"aaaaabbbbbb.com" if you can get it. I don't know what "aaaaa_bbbbb.com" is. You can't register and underscore.
why would you want "key-word.com" when you can have "keyword.com"?

 

princecharming.com and prince-charming.com. which one do you like to read? i happen to just see "cech" in a strong way as for a princecharming.com.

 

Thanks to make me understand that underscore is unavailable for domain name.
Now I understand that word1-word2.com is better than word1word2.com, except in some term such as keyword.com, backlink.com, etc

 

aaaaabbbbbb.com is the best domain if u want a very strong keyword domain "-" is ok too

 

I doubt such terms are better for SEO.

 

Always "-" is the best option for SEO purpose. I don't think that aa_bb id available for registration. Domain aaabbb is not good for SEO.

 

I wouldnt ever use a hyphen, always better as onecompleteword.com

 

Try to make it easy, I prefer to use aaaaabbbbbb.com,compared with other two. But I doubt that there's is any relationship with SEO?

 

For SEO with Hypen is best.