I was just wondering how exactly the warming word is used with different sentences which actually gives different meaning.

like in the sentence: My house warming ceremony

and in

Global warming

how it is actually giving different meaning? I understand the meaning of both  , but just curious about why it is exactly as such.. I would be glad if any one would explain this to me in detail about this.

Thank you in advance

I was just wondering how exactly the word warming is used with different sentences which actually gives different meaning.

For e.g.,

1. My house warming ceremony 2. Global warming

How it is actually giving different meaning? I understand the meaning of both, but just curious about why it is exactly as such. I would be glad if any one would explain this to me in detail about this.