peace offering vs offering

peace offering and offering both are nouns.

Word	Noun	Adjective	Verb	Adverb
peace offering	Yes	No	No	No
offering	Yes	No	No	No

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

peace offering: something offered to an adversary in the hope of obtaining peace
offering: something offered (as a proposal or bid)

Other hypernyms of peace offering include offer.

peace offering (noun)	offering (noun)
something offered to an adversary in the hope of obtaining peace	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