rivet vs take heed

rivet is a noun but take heed is not a noun.

Word	Noun	Adjective	Verb	Adverb
rivet	Yes	No	Yes	No
take heed	No	No	Yes	No

As verbs, take heed is a hyponym of rivet; that is, take heed is a word with a more specific, narrower meaning than rivet:

Other hyponyms of rivet include absorb, engross, engulf, immerse, plunge, soak up, steep, recall, think, zoom in, hear, listen.

rivet (noun)	take heed (noun)
heavy pin having a head at one end and the other end being hammered flat after being passed through holes in the pieces that are fastened together
ornament consisting of a circular rounded protuberance (as on a vault or shield or belt)

rivet (verb)	take heed (verb)
direct one's attention on something	listen and pay attention
hold (someone's attention)
fasten with a rivet or rivets