hefty vs sinewy

hefty and sinewy both are adjectives.

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

As adjectives, hefty and sinewy are synonyms defined as:

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

Other synonyms of hefty include brawny, muscular, powerful.

hefty (adjective)	sinewy (adjective)
large in amount or extent or degree	consisting of tendons or resembling a tendon
of considerable weight and size	(of a person) possessing physical strength and weight; rugged and powerful
(of a person) possessing physical strength and weight; rugged and powerful	(of meat) full of sinews; especially impossible to chew