On one of the quizzes the 'correct' answer said the word 'peace' could have both -ful or -less as a suffix. I've never heard of the word peaceless. Lol.
Welcome to the forums, Lynn.
Ems is right. Click here.
Now change the headword to 'peaceful' for comparison.
(Everybody should bookmark OneLook.com for future reference.)
It's uncommon, but it exists.