upchuck vs chuck

upchuck is not a noun while chuck is a noun.

Word	Noun	Adjective	Verb	Adverb
upchuck	No	No	Yes	No
chuck	Yes	No	Yes	No

As verbs, upchuck and chuck are synonyms defined as:

upchuck (noun)	chuck (noun)
	a holding device consisting of adjustable jaws that center a workpiece in a lathe or center a tool in a drill
	the part of a forequarter from the neck to the ribs and including the shoulder blade
	informal terms for a meal

upchuck (verb)	chuck (verb)
eject the contents of the stomach through the mouth	eject the contents of the stomach through the mouth
	throw carelessly
	pat or squeeze fondly or playfully, especially under the chin
	throw away