hefty vs brawny

hefty and brawny both are adjectives.

Word	Noun	Adjective	Verb	Adverb
hefty	No	Yes	No	No
brawny	No	Yes	No	No

As adjectives, hefty and brawny are synonyms defined as:

hefty and brawny: (of a person) possessing physical strength and weight; rugged and powerful

Other synonyms of hefty include muscular, powerful, sinewy.

hefty (adjective)	brawny (adjective)
large in amount or extent or degree	(of a person) possessing physical strength and weight; rugged and powerful
of considerable weight and size
(of a person) possessing physical strength and weight; rugged and powerful