rational
Vernunft
abstract thought
act of thought
analysis
analytic
argument
argumentation
arguments
brain
brains
brainwork
cerebral
cerebration
cogitation
conceit
conception
conceptive
conceptual
conceptualization
creative thought
discourse
discourse of reason
discursion
discursive reason
endopsychic
esprit
excogitation
explanation
explication
fallacy
gray matter
head
headpiece
headwork
heavy thinking
hypothesis
idea
ideation
imageless thought
intellect
intellection
intellectual
intellectual exercise
intellectual faculty
intellectualization
intelligence
intelligent
internal
logic
seasoning