Here are examples of the word/phrase "fortify" used in a sentence and paraphrased in a sentence...
I was able to fortify my territory with the new equipment I purchased.
I was able to reinforce my territory with the new equipment I purchased.
The wall is too thin. We need to fortify it.
The wall is too thin. We need to strengthen it.
Is there anything more I can do to fortify my home's security?
Is there anything more I can do to strengthen my home's security?
Other Examples...