What part of speech is the word passion?

The word "passion" can be several parts of speech depending on how it's used in a sentence:

* Noun: This is the most common usage, referring to a strong feeling of enthusiasm or excitement for something.

* Example: "She has a passion for art."

* Adjective: This is less common, but it can be used to describe something that evokes strong feelings or is intense.

* Example: "A passionate speech."

* Verb: This is even less common, but it can mean "to feel or show strong emotion" or "to love or admire deeply."

* Example: "He passioned for her beauty." (This usage is quite archaic.)

So, without context, it's hard to say definitively which part of speech "passion" is. You need to look at how it's used in the sentence to determine its function.