* Kernel: The central or most important part of something; the edible part of a grain.
* Colony: A group of people, animals, or plants living together in a particular place.
Let's break down why they aren't the other options:
* Homophones: Words that sound the same but have different meanings and spellings (e.g., "to," "too," and "two"). "Kernel" and "colony" have different sounds.
* Antonyms: Words with opposite meanings (e.g., "hot" and "cold"). "Kernel" and "colony" have no inherent opposite meanings.
* Synonyms: Words with the same or similar meanings (e.g., "happy" and "joyful"). "Kernel" and "colony" describe different concepts.