come down vs boil down

come down and boil down both are verbs.

Word	Noun	Adjective	Verb	Adverb
come down	No	No	Yes	No
boil down	No	No	Yes	No

As verbs, come down and boil down are synonyms defined as:

Other synonyms of come down include reduce.

come down (verb)	boil down (verb)
get sick	cook until very little liquid is left
be the essential element	be cooked until very little liquid is left
criticize or reprimand harshly	be the essential element
move downward and lower, but not necessarily all the way
fall from clouds