pour vs rain buckets

pour and rain buckets both are verbs.

Word	Noun	Adjective	Verb	Adverb
pour	No	No	Yes	No
rain buckets	No	No	Yes	No

As verbs, pour and rain buckets are synonyms defined as:

Other synonyms of pour include pelt, rain cats and dogs, stream.

pour (verb)	rain buckets (verb)
move in large numbers	rain heavily
flow in a spurt
cause to run
pour out gradually, so as to separate out sediment
supply in large amounts or quantities
rain heavily