What is the difference between the American English words: Opinion and Guess?

guess is random, even if there is a slight choice based on one being more likely than another.

An opinion is the result of an evaluation. It is something that you believe to be true but which is not factually true, it is an interpretation of facts (or many times based on no actual facts at all, the person has imaginary or "alternative" facts that lead to the belief). You cannot have an opinion on something that is factual. You can have an opinion about what the facts mean.

an opinion is a personal belief or thought on something. such as "cats are better than dogs". it's impossible to prove one animal is better than the other, so the sentence just states that person's preference rather than trying to state a truth or fact.

a guess is an attempt to answer a question or an attempt to explain something, but it's not very confident or backed up by facts. for example, if you're taking a test and don't know the answer, you could guess and choose an answer even if you aren't sure that you're right. this can be a completely random guess or an educated guess, using what little knowledge you have about the subject to increase your chance of answering correctly. for example, if you know A and B can't possible be right, then choosing C or D would be an educated guess because you've narrowed down your options.

https://en.oxforddictionaries.com/usage/british-an...

There isnt usually much difference between the two, just a letter added or left off.They are instantly understood by an English speaker.

The language was brought to them bu the original immigrants from England and were changed slightly in order to give them their own unique language.