X vs Adam

X and Adam both are nouns.

Word	Noun	Adjective	Verb	Adverb
X	Yes	No	No	No
Adam	Yes	No	No	No

As nouns, X and Adam are synonyms defined as:

Other synonyms of X include cristal, disco biscuit, ecstasy, go, hug drug, XTC.

X (noun)	Adam (noun)
street names for methylenedioxymethamphetamine	street names for methylenedioxymethamphetamine
the 24th letter of the Roman alphabet	(Old Testament) in Judeo-Christian mythology; the first man and the husband of Eve and the progenitor of the human race
the cardinal number that is the sum of nine and one; the base of the decimal system	Scottish architect who designed many public buildings in England and Scotland (1728-1792)