knob vs thickening

knob and thickening both are nouns.

Word	Noun	Adjective	Verb	Adverb
knob	Yes	No	No	No
thickening	Yes	Yes	No	No

As nouns, knob and thickening are synonyms defined as:

Other synonyms of knob include node.

knob (noun)	thickening (noun)
a round handle	the act of thickening
a circular rounded projection or protuberance	any thickened enlargement
an ornament in the shape of a ball on the hilt of a sword or dagger	any material used to thicken
any thickened enlargement

knob (adjective)	thickening (adjective)
	becoming more intricate or complex
	accumulating and becoming more intense