1. Acting together in secret toward a fraudulent or illegal end
   - conniving

See also: collude, covert

• bullfinch
• bullfrog
• bullhead
• bullhead catfish
• bullheaded
• bullheadedness
• bullhorn
• bullion
• bullish
• bullnecked
• bullnose
• bullnosed plane
• bullock
• bullock block
• bullock heart
• bullock's heart
• bullock's heart tree
• Bullock's oriole
• bullocky
• bullpen
• bullring
• bullrush
• bullshit
• bullshitter
• bullshot