bidding vs invitation

bidding and invitation both are nouns.

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

As nouns, invitation is a hypernym of bidding; that is, invitation is a word with a broader meaning than bidding:

bidding: a request to be present
invitation: a request (spoken or written) to participate or be present or take part in something

bidding (noun)	invitation (noun)
a request to be present	a tempting allurement
(bridge) the number of tricks a bridge player is willing to contract to make	a request (spoken or written) to participate or be present or take part in something
an authoritative direction or instruction to do something