The architecture should weaving together many articles written about tangent topics that indirectly and directly relate the your target keyword.
Wikipedia is the best example of using this weaving architecture, there is a never-ending list of words that are related. There are external links that send you offsite related topic and there are internal links that point toward onsite related topics.
However as simple worksheet,
We could take the title of this page:
"Site Architecture that Weaves Together Semantically Related Words Leading to One Keyword"
I want this page to support the the URL and build rank for this page.
SEO Search Engine Optimization
I can write these articles from the phrase: SEO Search Engine Optimization
Downstream on the title of this page:
Weave Together Semantically Related Words
Semantically Related Words
Point Architecture toward One Keyword
This is how Wikipedia builds a cloud or sphere of words, by simply explaining, the breaking down the words into sub meaning and explaining again. Then because of their mashing of words together in by human, it is natural.