As an adjective viary
is (obsolete) of or pertaining to roads; happening on roads.
As a noun aviary is
a house, enclosure, large cage, or other place for keeping birds confined; a birdhouse.
viary
English
Adjective
(
-)
(obsolete) Of or pertaining to roads; happening on roads.
(
Webster 1913)
aviary
English
Noun
(aviaries)
A house, enclosure, large cage, or other place for keeping birds confined; a birdhouse.