Statistics for -Ary Vocabulary Words

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Definition	Word	% Correct
Webster and Collins have published one	dictionary	91%
A date-based journal	diary	85%
Of the army, navy or airforce	military	85%
Does dictation, filing, typing etc	secretary	84%
Lovemaking position	missionary	80%
Biblioteca	library	79%
Zoo for birds	aviary	72%
Required, essential	necessary	71%
Limit of a country	boundary	62%
What you do you a job for	salary	62%
Where a river meets the sea	estuary	60%
Plain, undistinguished	ordinary	53%
A company owned by another	subsidiary	47%
Sports broadcasts have one	commentary	44%
Of the present day; modern	contemporary	42%
Without payment	voluntary	41%
Tired, exhausted	weary	37%
Taking an opposing position	contrary	36%
Alter; change	vary	34%
What follows secondary and tertiary	quaternary	22%