Adjectives ending with the letter A are listed in this post.
alpha
chicago-area
deep-sea, depression-era
extra
forsythia, fringilla
gala, guerilla, guerrilla
magenta, mega
oversea
per-capita, pucka, pukka
sepia
triple-a
ultima, ultra
vigonia
Hope this word list had the adjective that ends in A you were looking for. Additional descriptive words can be found in the other pages on this site.
Please add more adjectives to make this list more complete: