No, if you end a sentence with the word of, it would be an incomplete sentence. There will always be other words or at least one word that follows the word of in a sentence.
No, you would not capitalize either word in this sentence
Goodbye is one word. An example sentence would be "I would like to say goodbye to my friends".
A compound subject for impact would have to be two words that are subjects in the beginning of the sentence and the word impact would have to be in the sentence somewhere.
That would be alliteration.
and
Her Words Foretold That There Would Be Tragedy In The Future.
candid truthful trustworthy
Denotation is the main meaning of a word and not the feelings that the word seems like. A good sentence would be, the words of the poem were beyond their denotation.
Any time! I would use any words that I want to make up a sentence.
An example of a sentence using the word burdensome would be: Financial debt can be incredibly burdensome on a new family. An example of a sentence using the word burden would be: I don't wish to burden you with my troubles.
There are a large number of places online where one can find the meaning of the word pleading. Any online dictionary would be able to do this, any online thesaurus would be able to tell you alternative words.