nut vs oddball

nut and oddball both are nouns.

Word	Noun	Adjective	Verb	Adverb
nut	Yes	No	Yes	No
oddball	Yes	No	No	No

As nouns, oddball is a hypernym of nut; that is, oddball is a word with a broader meaning than nut:

Other hypernyms of nut include eccentric, eccentric person, flake, geek.

nut (noun)	oddball (noun)
a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt	a person with an unusual or odd personality
one of the two male reproductive glands that produce spermatozoa and secrete androgens
someone who is so ardently devoted to something that it resembles an addiction
a whimsically eccentric person
usually large hard-shelled seed
half the width of an em

nut (verb)	oddball (verb)
gather nuts