does dilapidated means the same what devastated?

Dilapidated is an adjective describing something (usually a building) that's run down and falling apart.

With most usages, dilapidated is not same as devastated.

http://dictionary.reference.com/browse/dilapidated

in this context coud I replace "delapidated" with "devastated" : One of the buildings he bought was dilapidated, however over years he had rebuilt it.

You could change it to --

One of the buildings he bought had been devastated; however over years he had rebuilt it.

Also, note the semicolon instead of a comma.

ok, thank you for your help :)

No, "dilapidated" and "devastated" do not mean the same thing, although they can both describe something in a state of disrepair or destruction.

"Dilapidated" refers to something that is in a state of decay or deterioration, typically due to neglect or age. It is often used to describe buildings or structures that are in a state of disrepair, with broken-down or crumbling elements.

On the other hand, "devastated" describes something that has been completely destroyed or severely damaged, often as a result of a disaster or a catastrophic event. It implies a much greater level of destruction compared to "dilapidated."

To ensure accuracy when understanding the meaning of words, it is always helpful to consult a trusted dictionary. You can easily access online dictionaries such as Merriam-Webster or Oxford English Dictionary, or use dictionary apps on your smartphone. These resources provide reliable definitions and examples of word usage.