As nouns the difference between grills and brills
is that grills is plural of grill while brills is plural of lang=en.
As a verb grills
is third-person singular of grill.
grills
English
Noun
(head)
Verb
(head)
(grill)
brills
English
Etymology 1
Noun
(head)
Etymology 2
Compare (etyl) Brille spectacles.