converge vs breast

converge is not a noun while breast is a noun.

Word	Noun	Adjective	Verb	Adverb
converge	No	No	Yes	No
breast	Yes	No	Yes	No

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

converge (noun)	breast (noun)
	the part of an animal's body that corresponds to a person's chest
	either of two soft fleshy milk-secreting glandular organs on the chest of a woman
	the front of the trunk from the neck to the abdomen
	meat carved from the breast of a fowl

converge (verb)	breast (verb)
come together so as to form a single product	confront bodily
move or draw together at a certain location	reach the summit (of a mountain)
be adjacent or come together	meet at breast level
approach a limit as the number of terms increases without limit