Synonyms|139Antonyms|28|Broader|4Narrower|0Related|61
9
annual
7
perennial
5
constant
3
one-year
2
aperiodic
2
intermittent
1
regular
0
continual
0
eternal
0
etesian
0
evergreen
0
fast
0
firm
0
fixed
0
generous
0
heady
0
perpetual
0
persistent
0
recurrent
0
yearlong
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APASmart Define. (2015). biennial thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/biennial/thesaurus/antonyms
ChicagoSmart Define. 2015. "biennial thesaurus" https://smartdefine.org/biennial/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, biennial thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/biennial/thesaurus/antonyms>.
MLASmart Define. "biennial thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/biennial/thesaurus/antonyms>