gnarly vs knotty

gnarly and knotty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
gnarly	No	Yes	No	No
knotty	No	Yes	No	No

As adjectives, gnarly and knotty are synonyms defined as:

gnarly and knotty: used of old persons or old trees; covered with knobs or knots

Other synonyms of gnarly include gnarled, knobbed, knotted.

gnarly (adjective)	knotty (adjective)
used of old persons or old trees; covered with knobs or knots	highly complex or intricate and occasionally devious
	used of old persons or old trees; covered with knobs or knots
	making great mental demands; hard to comprehend or solve or believe
	tangled in knots or snarls