bidding vs dictation

bidding and dictation both are nouns.

Word	Noun	Adjective	Verb	Adverb
bidding	Yes	No	No	No
dictation	Yes	No	No	No

As nouns, bidding and dictation are synonyms defined as:

bidding and dictation: an authoritative direction or instruction to do something

Other synonyms of bidding include bid, command.

bidding (noun)	dictation (noun)
a request to be present	speech intended for reproduction in writing
(bridge) the number of tricks a bridge player is willing to contract to make	an authoritative direction or instruction to do something
an authoritative direction or instruction to do something	matter that has been dictated and transcribed; a dictated passage