| Word | Definitions | Synonyms |
|---|---|---|
| biyearly | (adjective) occurring or payable twice each year | Synonyms: biannual, half-yearly, semiannual |
| (adjective) occurring every second year | Synonyms: biennial | |
| (adverb) every two years | Synonyms: biennially | |
| (adverb) twice a year | Synonyms: semiannually |