Here's a list, sorted by length:
2 Letters:
* an
* he
* in
*
3 Letters:
* and
* her
* ran
* ear
4 Letters:
* ache
* hand
* rank
* hear
* khan
5 Letters:
* chink
* crane
* haken
* hanker
* naker
* reaches
* hunch
6 Letters:
* anchor
* chicaner
* reaches
* reaches
7 Letters:
* hankerer
8 Letters:
* handkerch
Let me know if you'd like me to try and find more! I can also try to find words of a specific length, or words that use certain letters.