Synonyms for Come down:

n.

dip, dwindle, crater. adjudicate, determine, resolve, make up your mind, commit yourself, arrive at, decide, conclude. airlift, climb, ditch, eject, down, bank, captain, buzz. backfire, bomb, flop, founder, fizzle, languish, miss. appraise, bargain, bounce back, cap, bottom out, cheapen, Capping. hail, the heavens opened, pour, snow, rain, pelt, lash down, beat down, drizzle. bottomless, depth, fathom, knee-deep, fathomless, bottommost, deeply, deep. lose your balance/footing. collapse, give way, subside, fall in, cave in. cover, shuttle, go, hitchhike, hitch, cruise, ride, come up, commute. linger, take forever, run on, see out, grind on, run over, stand the test of time, drag on, endure. jack up, deal, abuse, mainline, o.d., lace. come down in someone's estimation/opinion, abase yourself, debase yourself, shame, demean yourself, fall from grace/favor, dishonor, lose face, lower yourself, go down in someone's opinion. come down (noun)
boil down, descend, go down, precipitate, fall, reduce, sicken.
worsen (noun)
suffer, go downhill, fail.

v.

descend (verb)
decline, fall, drop, lower, plummet, settle, slide, sink, descend, fall down, slip, topple, slump, tumble, plunge.
descended (verb)
settled, Slid, Descended, fallen down, Declined, slumped, sunk, came down, Plunged, Toppled, Tumbled, fell down, lowered, plummeted, nose-dived, Sank, Slipped, dropped.
motion (verb)
fall, go down, descend.
weather (verb)
fall, precipitate.
worsen (verb)
decline, descend, fall, reduce, fail, suffer, go downhill.

Other synonyms:

conclude, linger, drag on, decide, lash down, bottommost, adjudicate, deeply, grind on, arrive at, fail, ditch. airlift, determine, bottomless, eject, endure, fathom, knee-deep, fathomless, bank, drizzle, pour, snow, resolve, run on, fall in. pelt, captain, beat down, subside, o.d., rain. jack up, mainline. deep, see out, buzz, hail. depth, run over, climb. collapse. dip, down. Other relevant words:
drizzle, go down, reduce, pelt, subside, dwindle, ditch, boil down, suffer, precipitate, dip, collapse, go downhill, fall in, down, sicken, fail, rain, pour.