knotty vs gnarly

knotty and gnarly both are adjectives.

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

As adjectives, knotty and gnarly are synonyms defined as:

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

Other synonyms of knotty include gnarled, knobbed, knotted.

knotty (adjective)	gnarly (adjective)
highly complex or intricate and occasionally devious	used of old persons or old trees; covered with knobs or knots
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