aesthetics
allegiance
assigned task
axiology
bounden duty
burden
business
call of duty
casuistry
charge
commitment
cosmology
dedication
deference
devoir
devotion
duties and responsibilities
duty
epistemology
eudemonism
fealty
first philosophy
gnosiology
hedonics
homage
imperative
line of duty
logic
loyalty
mental philosophy
metaphysics
mission
moral philosophy
morality
morals
must
obligation
ontology
onus
ought
phenomenology
philosophastry
philosophic doctrine
philosophic system
philosophic theory
philosophical inquiry
philosophical speculation
philosophy
place
ethic
ethical
ethos
bioethics