Yes- in a surname. eg Robinson, Davison, Williamson, Johnson, etc. These names do not always indicate that the person was the son of Robert, David, William, John etc.
You could add the suffix -s to it to make the word isles.
One possible suffix that could be used for the word "encamp" is "-ment", forming the word "encampment."
Teacherness is not even a suffix, nor a word.
The suffix -ly could be used with the word peaceful to create peacefully.
A suffix for the word "marry" could be "-ed" to form "married."
A possible suffix for the word "wrathful" could be "-ness." For example, "wrathfulness."
Neither, a prefix comes at the beginning of a word and the suffix at the end; therefore a word could not be either but parts of it could in this word tion is a suffix and the base word would be resolute. Hope this helps:)
A suffix for white could be "-ness" or "-ish." An example word with the suffix "-ness" would be "whiteness," and an example word with the suffix "-ish" would be "whitish."
You could add the suffix -ing to it to make the word sparking.
A suffix you could add to the root word "pray" is "-er" to create the word "prayer."
A suffix of "knight" could be "-ly" to form the word "knightly".
You could add the suffix -able to it to make the word approachable.