There was a farmer had a dog, and bingo was his name, OH!
B-I-N-G-O! B-I-N-G-O! B-I-N-G-O!
And bingo was his name, Oh!
(repeat five times, dropping one letter each time).
You can memorize words in a relaxed way if you pronounce them reasonably. Say words correctly, and you will learn them easily. Correct pronunciation means correct spelling of the words.