tercentennial/tuhsənʹteni·əl/ noun

• additional
• additional member system
• additive
• addle
• add-on
• add/put in one's twopenn'orth
• address
• addressable
• adduce
• adduct
• add up
• -ade
• aden-
• adenine
• adeno-
• adenoid
• adenoidal
• adenoma
• adenosine
• adenosine diphosphate
• adenosine monophosphate
• adenosine triphosphate
• adept
• adequate
• ADF