Final answer:
The words 'job', 'polish', and 'herb' all have the same number of letters. They are not homophones, palindromes or words containing silent letters. These terms are in a category known as homonyms and homographs.
Step-by-step explanation:
The special characteristic of the words 'job', 'polish', and 'herb' is not that they have silent letters, nor are they homophones or palindromes. What they have in common is: c. They have the same number of letters. As you mentioned, homonyms are words that sound the same and are spelled the same but have different meanings. Homographs have the same spelling but different sounds and meanings. Lastly, homophones are words that sound the same but may have different spellings, different meanings, or both. Understanding these differences can help avoid confusion when using these terms.
Learn more about English Vocabulary