Grub noun - Substances intended to be eaten.
Usage example: after the game, we headed to the diner for some hearty grub
Meal is a synonym for grub in food topic. In some cases you can use "Meal" instead a noun "Grub", when it comes to topics like cooking, eats.
Nearby Word: grubby
How words are described
Both words in one sentence
Google Ngram Viewer shows how "grub" and "meal" have occurred on timeline