* Noun: This is the most common usage. "Analogy" refers to the concept of drawing a comparison between two things, especially for the purpose of explanation or clarification.
* Example: "The teacher used an analogy to explain the concept of photosynthesis."
* Adjective: "Analogous" means "similar or comparable to something else."
* Example: "The two situations were analogous, leading to similar outcomes."
* Verb: While less common, "to analogize" means "to use an analogy to explain something."
* Example: "The professor analogized the human brain to a computer."
So, to determine the part of speech of "analogy" in a specific sentence, you need to consider its role in the sentence.