contract offer vs offering

contract offer and offering both are nouns.

Word	Noun	Adjective	Verb	Adverb
contract offer	Yes	No	No	No
offering	Yes	No	No	No

As nouns, offering is a hypernym of contract offer; that is, offering is a word with a broader meaning than contract offer:

contract offer: offer by an employer to contract to pay an employee at a given rate
offering: something offered (as a proposal or bid)

Other hypernyms of contract offer include offer.

contract offer (noun)	offering (noun)
offer by an employer to contract to pay an employee at a given rate	the act of contributing to the funds of a church or charity
	something offered (as a proposal or bid)
	the verbal act of offering
	money contributed to a religious organization; item or items contributed to a religious organization for religious purposes