Question: I think they are inherently the same thing and don't deserve multiple tags. 

Breakdown of the tags:

* [distro](https://askubuntu.com/questions/tagged/distro "show questions tagged 'distro'") x 15
* [distribution](https://askubuntu.com/questions/tagged/distribution "show questions tagged 'distribution'") x 40
* [distributions](https://askubuntu.com/questions/tagged/distributions "show questions tagged 'distributions'") x 3
* [linux-distro](https://askubuntu.com/questions/tagged/linux-distro "show questions tagged 'linux-distro'") x 14

Answer: 
These tags have been destroyed.

[Please care for the widows and orphans](https://askubuntu.com/tags/untagged).
> 
> Based on @jacob and @njallam
> 
> 
> 

Let's just destroy them!
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This site is about Ubuntu, so none of these tags are needed. This is like having [programming-language](https://askubuntu.com/questions/tagged/programming-language "show questions tagged 'programming-language'") in Stack Overflow.