sinewy vs fibrous

sinewy and fibrous both are adjectives.

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

As adjectives, sinewy and fibrous are synonyms defined as:

sinewy and fibrous: (of meat) full of sinews; especially impossible to chew

Other synonyms of sinewy include stringy, unchewable.

sinewy (adjective)	fibrous (adjective)
consisting of tendons or resembling a tendon	(of meat) full of sinews; especially impossible to chew
(of a person) possessing physical strength and weight; rugged and powerful	having or resembling fibers especially fibers used in making cordage such as those of jute
(of meat) full of sinews; especially impossible to chew