millennial

I would say no.

GPYI would say no.

Can I say an "over-one-thousand-year-old" temple???

"millennial temple " would be used for a temple that (is)(was) built to celebrate the 1,000 year anniversary of something. (such as 1,000 years of continuous rule by one monarchy or 1,000 years of a country's independence, etc)

canadian45"millennial temple " would be used for a temple that (is)(was) built to celebrate the 1,000 year anniversary of something. (such as 1,000 years of continuous rule by one monarchy or 1,000 years of a country's independence, etc)

Thanks a lot!

Brenda1stCan I say an "over-one-thousand-year-old" temple???

It's a bit awkward. "thousand-year-old temple" would be OK, but if you want to add the word "over", I would rephrase it, e.g. as "temple (that is) over a thousand years old". The exact choice of wording may depend on the sentence in which it is embedded.