What's the difference between termendous and enormous
I am confused about these two words that how to use them in sentence.Can anyone answer me that?

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Tremendous=Very good. For example:
"I just got promoted at work. Isn't that tremendous?"

Enormous=Very big. For example:
"Look at that big truck. It's enormous."

Both of these words are a little formal, or at least, a little old-fashioned. For very good you can say great/awesome/wonderful. For very big you can say huge/massive/gigantic.

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I agree with Janet.  Example:  I heard a tremendous explosion.

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Or I have been experienced a tremendous thing ?

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@Janet:for this word .can I say : I have got promotion.It's so tremendous ?

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I agree "tremendous" can mean very good.  But I also use it and hear it used for very big, similar to "enormous."