rhumb /rum/ (nautical)

1. A loxodromic curve
2. A course following such a fixed line
3. Any point of the compass

• on one's own
• on one's own account
• on one's own ground
• on one's own head be it
• on one's own hook
• on one's pantables
• on one's person
• on one's plate
• on one's toes
• on one's uppers
• on one's watch
• on order
• on pain of
• on paper
• on penalty of
• on pins and needles
• on prescription
• on principle
• on purpose
• on record
• on remand
• on request
• onrush
• onrushes
• ons