rupturewort 
noun
A small Old World plant of the pink family, which was formerly believed to cure hernias.
- Herniaria glabra, family Caryophyllaceae.
- on the strength of
- on the stroke of ——
- on the table
- on the telephone
- on the tiles
- on the tip of one's tongue
- on the town
- on the trot
- on the turn
- on the turps
- on the up and up
- on the upgrade
- on the wallaby (track)
- on the wane
- on the whole
- on the wing
- on the wrong side of
- on the —— side
- on thin ice
- on this (or that) account
- (on) this side of the grave
- ontic
- ontical
- ontically
- Godard, Jean-Luc