All 16 words, sorted alphabetically. Group them into four categories of four.
The four category names, easiest to hardest. No words revealed yet.
Theme name plus one word from each category.
Cucumber, eggplant, pepper, and tomato are all botanically fruits (they develop from flowers and contain seeds) but are commonly referred to as vegetables in culinary contexts.
Cone, cube, pyramid, and sphere are all three-dimensional geometric shapes.
Mac, Pad, Phone, and Pod all follow the lowercase 'i' to form Apple product names: iMac, iPad, iPhone, and iPod.
Job (biblical name vs. employment), Lima (capital of Peru vs. city in Ohio/type of bean), Mobile (able to move vs. city in Alabama), and Polish (nationality vs. to shine) each have two distinct pronunciations with different meanings.