Ada
Adverb : there is (are)
There is (are) a (some) white board(s) in my classroom
Adverb : exist
They don't event existed yet
Adjctive : available
Is Mrs. Zulfa available?
Mengadakan : hold/ carry out
We will hold/ carry out a competition in celebrating independence day tomorrow
Berada
Adverb of place : is at
She is at home home
Adjective : rich/ well off/ wealthy
he comes from a wealthy family
keberadaan (n) : Existence
The existence of Komodo dragons is currently increasingly rare
Pengadaan (n) : Procurement
Procurement of these goods must be approved by the chef of officer
keadaan (n) : condition
The condition of the weather is uncertain
adanya (n)
this meeting makes us understand the real situation
seadanya (adv):
he will help us as best as he can