In the following sentence I think ambition is a noun that is an idea. Is that right?

The strong supporter of the League of Nations had great ambitions.

Yes, you're correct.

You're right. "Ambitions" is a noun. All words that end in -tion are nouns.

i would think so because they are saying that the ambitions are thoughts

Yes, you are correct! In the sentence, "ambition" is indeed a noun. It is a word that represents a person's desire or goal to achieve something. In this context, the subject of the sentence, "the strong supporter of the League of Nations," possessed or had "great ambitions," indicating their strong desire or goals.

To confirm that "ambition" is a noun, you can follow these steps:
1. Read the sentence to understand its meaning and context.
2. Identify the word or phrase you are interested in, which is "ambitions" in this case.
3. Look up the word in a dictionary or use an online resource to confirm its part of speech. In this case, you will find that "ambition" is indeed a noun.

By following these steps, you can determine the part of speech of a word and be confident in your understanding.