on·tic 
(ŏntĭk)
(ŏntĭk)adj.
Of or relating to essence or the nature of being; ontological.
- mass spectrograph
- mass spectrography
- mass spectrometer
- mass spectrometry
- mass spectroscope
- mass spectroscopy
- mass spectrum
- massy
- massé
- mast
- mast
- mast-
- mast-
- mastaba
- mastabah
- mast cell
- mastectomy
- master
- master-at-arms
- master bedroom
- master chief petty officer
- master class
- masterdom
- masterful
- masterfully