Other hyponyms of intellectual include
anomalist,
exponent,
alchemist,
aphorist,
bel esprit,
clever clogs,
clever Dick,
decipherer,
decoder,
egghead,
expositor,
expounder,
brain,
brainiac,
Einstein,
genius,
mastermind,
highbrow,
mentor,
wise man,
bookman,
scholar,
scholarly person,
doubter,
sceptic,
specifier,
subjectivist,
synthesiser,
synthesist,
synthesizer,
idealogue,
theoretician,
theoriser,
theorist,
theorizer,
creative thinker,
mind,
thinker,
thinker,
illusionist,
seer,
visionary,
wonderer.