"I used each artist’s first 35,000 lyrics. This way, prolific artists, such as Jay-Z, can be compared to newer artists, such as Drake," Daniels explained on the website.
So how does your favourite wordsmith fare?
Cult Californian rapper Aesop Rock comes out as the wordiest rapper, with a vocabulary of 7,879 unique words. GZA and Kool Keith all land top 10 spots, too, but what's way more interesting are the rappers who sit at the bottom of the chart.
Slotting in at the bottom is rapper NF, with a vocabulary of 2,472 unique words. Lil Uzi Vert, DMX and 21 Savage also landed at the bottom of the list.
South Africa rap artists aren't on the list, but who do you think would make the top 10? Tweet us.