"yearly" in the noun sense
1. annual, yearly, yearbook
a reference book that is published regularly once every year
"yearly" in the adjective sense
1. annual, yearly
occurring or payable every year
"an annual trip to Paris"
"yearly medical examinations"
"annual (or yearly) income"
"yearly" in the adverb sense
1. annually, yearly, every year, each year
without missing a year
"they travel to China annually"
Source: WordNet® (An amazing lexical database of English)
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