underbid vs bid

underbid is not a noun while bid is a noun.

Word	Noun	Adjective	Verb	Adverb
underbid	No	No	Yes	No
bid	Yes	No	Yes	No

As verbs, bid is a hypernym of underbid; that is, bid is a word with a broader meaning than underbid:

Other hypernyms of underbid include offer, tender.

As verbs, bid is a hypernym of underbid; that is, bid is a word with a broader meaning than underbid:

Other hypernyms of underbid include offer, tender.

As verbs, bid is a hypernym of underbid; that is, bid is a word with a broader meaning than underbid:

underbid: bid (a hand of cards) at less than the strength of the hand warrants
bid: make a demand, as for a card or a suit or a show of hands

Other hypernyms of underbid include call.

underbid (noun)	bid (noun)
	an attempt to get something
	a formal proposal to buy at a specified price
	(bridge) the number of tricks a bridge player is willing to contract to make
	an authoritative direction or instruction to do something

underbid (verb)	bid (verb)
bid too low	ask someone in a friendly way to do something
bid lower than a competing bidder	invoke upon
bid (a hand of cards) at less than the strength of the hand warrants	ask for or request earnestly
	propose a payment
	make a demand, as for a card or a suit or a show of hands
	make a serious effort to attain something