Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun annual

2 senses of annual

Sense 1
annual -- ((botany) a plant that completes its entire life cycle within the space of a year)
       => plant, flora, plant life -- ((botany) a living organism lacking the power of locomotion)

Sense 2
annual, yearly, yearbook -- (a reference book that is published regularly once every year)
       => reference book, reference, reference work, book of facts -- (a book to which you can refer for authoritative facts; "he contributed articles to the basic reference work on that topic")

Antonyms of adj annual

2 senses of annual

Sense 1
annual (vs. biennial) (vs. perennial), one-year -- (completing its life cycle within a year; "a border of annual flowering plants")

biennial (vs. perennial) (vs. annual), two-year -- (having a life cycle lasting two seasons; "a biennial life cycle"; "parsnips and carrots are biennial plants often grown as annuals")
perennial (vs. annual) (vs. biennial) -- (lasting three seasons or more; "the common buttercup is a popular perennial plant")

Sense 2
annual, yearly -- (occurring or payable every year; "an annual trip to Paris"; "yearly medical examinations"; "annual (or yearly) income")

INDIRECT (VIA periodic) -> aperiodic, nonperiodic -- (not recurring at regular intervals)

Similarity of adj annual

2 senses of annual

Sense 1
annual (vs. biennial) (vs. perennial), one-year -- (completing its life cycle within a year; "a border of annual flowering plants")

Sense 2
annual, yearly -- (occurring or payable every year; "an annual trip to Paris"; "yearly medical examinations"; "annual (or yearly) income")
       => periodic (vs. aperiodic), periodical -- (happening or recurring at regular intervals; "the periodic appearance of the seventeen-year locust")