saraband or sarabande /sarˈə-band/

1. A slow Spanish dance or dance tune
2. A suite-movement in its rhythm, in 3–4 time strongly accented on the second beat (a dotted crotchet or minim)

• once in a blue moon
• once in a way
• once in a while
• once more
• once or twice
• once-over
• once-overs
• oncer
• oncers
• onces
• once upon a time
• onchocerciases
• onchocerciasis
• oncidium
• oncidiums
• on cloud nine
• onco-
• oncogen
• oncogene
• oncogenes
• oncogeneses
• oncogenesis
• oncogeneticist
• oncogeneticists
• oncogenic