• arabe,
• arabi,
• ariubd,
• arewa,
• acuba,
• aribag,
• arota,
• aroubd,
• arubly,
• aribs,
• aurua,
• arura,
• araiba,
• areta,
• arruba,
• arouma,
• arora,
• areqa,
• arera,
• aurura

• arabia,
• arb,
• arab,
• arava,
• arapaho,
• arroba,
• arp.

The adjective form of the word "Aruba" is "Aruban".

The plural form of the word "Aruba" is also "Aruba." The word does not change when referring to multiple instances of the same thing.

The singular form of the word "Aruba" remains the same, as "Aruba" is already a proper noun in its singular form.