To make this a bit more challenging, let's follow these rules:
* Real words only: No made-up words.
* Minimum 3 letters: We don't want to count tiny words like "a" or "to."
* No proper nouns: We'll stick to common nouns, verbs, adjectives, etc.
Here's what I came up with:
3 Letters:
* auto
* out
* toy
4 Letters:
* boat
* bout
* gout
* riot
* toby
* yoga
5 Letters:
* about
* autot
* byway
* gaily
* goby
* goaty
* guilt
* orbit
* ought
* roaty
6 Letters:
* abouts
* agouti
* autoty
* bayout
* biota
* byword
* gayly
* guilty
* outbid
* outgo
7 Letters:
* autobio
8 Letters:
* biography
9 Letters:
* autography
11 Letters:
* autobiography
Total: 31 words
Did you find any more? Let me know!