I have a lot of books that have 語彙力 in the title, intended for Japanese natives, because I have been looking for ways to expand my vocabulary, but since they’re meant for natives usually they assume a very high baseline level of ability with the language. They’re trying to take you from adult native to eloquent adult native.
I finally found one that is meant for taking you from “a kid in elementary school” to “a slightly more knowledgeable kid in elementary school.”
I would recommend this for intermediate and up. Beginners will probably struggle too much with the grammar of the passages.
The full name is ふくしま式「本当の語彙力」が身につく問題集［小学生版］
You can see a preview of the book on the Amazon page.
Each page has a theme, and all the words are introduced in antonym pairs.
The first theme is 新しい vs. 古い
Now, don’t be put off by how ridiculously simple that sounds, because the page covers things like 革新 vs. 保守 and モダン vs. クラシック as well.
As the book progresses, the themes become increasingly more abstract.
At the bottom there’s always a fill-in-the-blanks style passage that I think even intermediate learners should be able to tackle without too much trouble.
Anyway, I found this to be exactly the kind of resource I was looking for to get a better handle on a lot of these trickier nuances in word usage. I feel much more confident about how to use the words I’ve come across in the book now. WK has greatly improved my ability to pronounce words, but you need to go above and beyond to be able to use them correctly.
and I just want to thank you for the time you put into them 
(I’m sure the whole community feels the same way).