* بنجر (banjar): This is the most common and widely understood word across many Arabic dialects. It's a loanword from Persian. The pronunciation is roughly "ban-jer" with a short "a" sound like in "apple" and a "j" sound like in "judge."
* شمندر (shamandar): This is another common word, particularly in some Levantine dialects. The pronunciation is roughly "sha-man-dar" with a short "a" sounds and the emphasis on the second syllable. This word is also a loanword.
So, while *banjar* is probably your best bet for general understanding, be aware that *shamandar* is also used and both are acceptable.