twofer vs offering

twofer and offering both are nouns.

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

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

Other hypernyms of twofer include offer.

twofer (noun)	offering (noun)
an offer of two for the price of one	the act of contributing to the funds of a church or charity
a coupon that allows the holder to purchase two items (as two tickets to a play) for the price of one	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