boil vs decoct

boil is a noun but decoct is not a noun.

Word	Noun	Adjective	Verb	Adverb
boil	Yes	No	Yes	No
decoct	No	No	Yes	No

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

boil (noun)	decoct (noun)
the temperature at which a liquid boils at sea level
a painful sore with a hard core filled with pus

boil (verb)	decoct (verb)
immerse or be immersed in a boiling liquid, often for cooking purposes	extract the essence of something by boiling it
come to the boiling point and change from a liquid to vapor	steep in hot water
bring to, or maintain at, the boiling point	be cooked until very little liquid is left
be in an agitated emotional state
be agitated