A domain hack has nothing to do with hacking a domain or website. The "hack" represents a trick (as in programming), not an exploit or break-in (as in security).
Domains such .as .it, .me ,.to, .is and .us are easy to use as domain hacks as they correspond to short, simple dictionary words. Sometimes a name is chosen so that the last few characters match an existing top-level domain, such as "inter.net", so that every character is used in forming the common name.
We show here one example from the German language: dasbu.ch
The Swiss ch-domain is combined with a word, that a new notion is created: the book.
The co-Domains can also be used for domain hacks.
Many words are ending at co.
Some examples:
-coco http://co.co
-disco http://dis.co
-fresco http://fres.co
-tobacco http://tobac.co
-flamenco http://flamen.co
-magnifico http://magnifi.co
You find here English words ending with co:
https://www.morewords.com/...
And also here:
https://www.bestwordlist.com/...
There are many words ending with co at the Italian language.
You find 4762 words ending with co her:
https://www.parolecon.it/...
And you discover even 7283 words ending with co here:
https://www.parolecon.it/...
Hans-Peter Oswald
http://www.domainregistry.de/... (deutsch)
http://www.domainregistry.de/... (English)