Concept:An anagram is a word or phrase created by rearranging all the letters of another word or phrase exactly once. This is a common concept in word puzzles and vocabulary.
Explanation:The question asks for a single word that means a word formed by rearranging the letters of another word. The term "anagram" fits this definition perfectly.
For example, the word "listen" can be rearranged to form "silent". Similarly, "earth" becomes "heart". These are classic anagrams.
Now consider the other options:
- Acronym: a word made from the first letters of a phrase, like "NASA" from "National Aeronautics and Space Administration". It does not involve rearranging letters.
- Homonym: words that sound the same but have different meanings, such as "bare" and "bear". No letter rearrangement is involved.
- Synonym: words with similar meanings, like "big" and "large". No letter rearrangement occurs.
Only "anagram" matches the given description. Therefore, it is the most suitable one-word substitution.
Answer:Option B – Anagram