Tamil Subject Dictionary - Branches of Science (Pages: 21)

Nomology	Noology
Nosology	Nostology
Notaphily	Numerology
Numismatics	Nymphology
Obstetrics	Oceanography , Oceanology
Odology	Odontology
Oenology	Oikology
Olfactology	Ombrology
Oncology	Oneirology
Onomasiology	Onomastics
Ontology	Oology
Ophiology	Ophthalmology
Optics	Optology
Optometry	Orchidology
Ornithology	Orology