geek vs fruitcake

geek and fruitcake both are nouns.

Word	Noun	Adjective	Verb	Adverb
geek	Yes	No	Yes	No
fruitcake	Yes	No	No	No

As nouns, fruitcake is a hyponym of geek; that is, fruitcake is a word with a more specific, narrower meaning than geek:

Other hyponyms of geek include crackpot, crank, nut, nut case, screwball, nutter, wacko, whacko.

geek (noun)	fruitcake (noun)
a person with an unusual or odd personality	a rich cake containing dried fruit and nuts and citrus peel and so on
a carnival performer who does disgusting acts	a whimsically eccentric person

geek (verb)	fruitcake (verb)
to be intoxicated