congest vs lug

congest is not a noun while lug is a noun.

Word	Noun	Adjective	Verb	Adverb
congest	No	No	Yes	No
lug	Yes	No	Yes	No

As verbs, lug is a hyponym of congest; that is, lug is a word with a more specific, narrower meaning than congest:

Other hyponyms of congest include gum up, block, choke up, stuff, silt, silt up.

congest (noun)	lug (noun)
	marine worms having a row of tufted gills along each side of the back; often used for fishing bait
	a projecting piece that is used to lift or support or turn something
	a sail with four corners that is hoisted from a yard that is oblique to the mast

congest (verb)	lug (verb)
become or cause to become obstructed	carry with difficulty
	obstruct