Rill : A small stream
Loon : A silly or foolish person
Reward : recompense
Meaning, weight or significance : Measure
Burthen : rhythm of a piece
<u>Explanation:</u>
Choice of words for a poem are made the readers to understand the meaning of the poem well. Using good words help the readers get the theme of the poem well and give an impact of the poem.
The words used in these stanzas of different poems are like loon which means a foolish person, rill which means a small stream, recompense which means a compensation or a reward given for the loss.