rattle off vs rattle down

rattle off and rattle down both are verbs.

Word	Noun	Adjective	Verb	Adverb
rattle off	No	No	Yes	No
rattle down	No	No	Yes	No

As verbs, rattle off and rattle down are synonyms defined as:

Other synonyms of rattle off include reel off, roll off, spiel off.

rattle off (verb)	rattle down (verb)
recite volubly or extravagantly	recite volubly or extravagantly