What part of speech is solution?

"Solution" can be several parts of speech depending on its context:

* Noun: This is the most common usage. It refers to the answer to a problem or question, or the process of solving something.

* Example: "They found a solution to the traffic congestion."

* Adjective: This usage is less common, but still valid. It means "capable of being dissolved" (usually referring to liquids).

* Example: "Salt is a solution substance."

To determine the part of speech, you need to consider the context of the sentence.