I have 100 000 keywords on my website. But I can't put them in meta keywords tag, so I make a function who displays 20 keywords in the footer of my website, "randomly" for each "refresh of page". so like that Google can see them for each reloading of my pages. Each refresh page, gives him 20 other keywords.
And I add a link for each keyword to the same content with each different URL, so I create a duplicate content.
Can you give me a better solution for using all my 100 000 keywords, without using duplicate content?