knobbed vs knotty

knobbed and knotty both are adjectives.

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

As adjectives, knobbed and knotty are synonyms defined as:

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

Other synonyms of knobbed include gnarled, gnarly, knotted.

knobbed (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