Therefore, the number 15000 in words is: Fifteen Thousand . So, whenever you see 15000 in questions, cheques or notes, the correct way to spell it in English is " Fifteen Thousand ". This table helps you see the number spelling patterns for 15000 and similar numbers. Learn how to write and say 15000 in words as Fifteen Thousand using the place value chart. Find out the properties, facts and problems of 15000 in numbers and words . How to write 15000 number in English words ? Easily convert any given number to words in US English and other languages. Spelling of 15000 - aCalculator 15000 in Words - Know how to write 15000 in English. Learn how to write the number 15000 in words at Careers360.com.