A suffix of nouns of French or other Romance origin, as accolade, ambuscade, brigade, cannonade, lemonade, etc., or of (a few) English nouns formed on the same model, as blockade, orangeade.
A suffix of nouns of Spanish or Italian origin (originally masculine form of preceding), as brocade, renegade, etc. It also appears in the Spanish form -ado, as in renegado, desperado.
A suffix of Greek origin, now usually -ad, as in decade (sometimes decad), nomade (usually nomad, like monad, triad, etc.).
A drink of the lemonade or orangeade class.
The Century Dictionary (Public Domain)