As an adjective nonday
is not taking place in the day.
As a noun nonda is parinari nonda
, a shrub or small tree of northern australia and new guinea, with edible plum-like fruit.
As adjectives the difference between nonday and nongay
is that nonday
is not taking place in the day while nongay
is not gay (homosexual).
As a noun nongay is
a person who is not gay.
As a noun noonday
is the time of noon; the time of day when the sun is highest in the sky, especially on a hot day.
As an adjective nonday is
not taking place in the day.