brawny vs hefty

brawny and hefty both are adjectives.

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

As adjectives, brawny and hefty are synonyms defined as:

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

Other synonyms of brawny include muscular, powerful, sinewy.

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