In the study of linguistic structure, certain comparisons can illuminate underlying relationships in language. For instance, the relationship between a word and its synonym can be likened to that of a seed and its tree. A seed is the beginning of a tree's development, just like a word's synonym represents a variation of the original concept.
This analogy can be further examined: a 'blanket' is to 'comfort' as what is to 'courage'. Identify the word that draws a similar relational comparison to 'courage' as 'blanket' does to 'comfort'.