maggot vs grub

maggot and grub both are nouns.

Word	Noun	Adjective	Verb	Adverb
maggot	Yes	No	No	No
grub	Yes	No	Yes	No

As nouns, grub is a hypernym of maggot; that is, grub is a word with a broader meaning than maggot:

maggot: the larva of the housefly and blowfly commonly found in decaying organic matter
grub: a soft thick wormlike larva of certain beetles and other insects

maggot (noun)	grub (noun)
the larva of the housefly and blowfly commonly found in decaying organic matter	a soft thick wormlike larva of certain beetles and other insects
	informal terms for a meal

maggot (verb)	grub (verb)
	search about busily
	ask for and get free; be a parasite