Adjective : biennial games. ,a biennial life cycle.    From Dictionary.com. 

The conciliative is a supposedly pretentious for osmotically shinny and a fantabulous saltpetre for an biyearly sugi.    From Wordnik.com.  [Rational Review] Reference

The biyearly report, which looks at application usage on 200 different enterprise networks around the world, found a dramatic increase in social media usage inside the enterprise.    From Wordnik.com.  [Megite Technology News: What's Happening Right Now] Reference

It's a biyearly drill.    From Wordnik.com.  [CNN Transcript Nov 14, 2002] Reference

There should be a biyearly interchange. ".    From Wordnik.com.  [Rezánov] Reference