Each of the words an, am, at, come, rate and many others can be transformed into a new valid word by adding a prefix be.
The following list consists of 16 words, which may be sorted into 4 groups, each of 4 words fitting the same two-letter prefix, specific for that group.
One such group needs KN as a prefix.
Other 2-letter prefixes are up to you to find.
All 16 words must be used.

1. able
2. aid
3. air
4. and
5. ant
6. art
7. ash
8. ave
9. easy
10. eel
11. idle
12. irk
13. other
14. out
15. own
16. ows

(In reply to re(2): first thoughts @ Charlie & Dej Mar by Ady TZIDON)

Dej Mar,

Although 90% of my post was addressed to you re your misgivings,your choice was not to answer the  issues I've mentioned, you just edited the BRAVE-KNAVE error, added another solution and made my remarks irrelevant for solvers reading the final product in the future.

The issues of your  criticizing the topics not implied in the puzzle, directing your remarks at the proper time (reviewing board), presenting your parameters for rating, and gearing your comments towards improving the text and not to show-of (sometimes irrelevant) knowledge - all those issues were ignored.

You have the right to remain silent, - bur fair behavior is commenting on the accusations, true or exaggerated , - which I ALWAYS PREFER.

ing

Posted by Ady TZIDON on 2016-08-21 06:00:23