1. The initials are all "b": Bao, Bao, Bao, Bao, Bao. The tones of this group of "Bao" are different from the first sound to the fourth sound, but the vowels are all "ao" and the vowels are the same, so they all emphasize the rhyme of "ao".
2. the initials are all "d": island, Tao, Tao and Tao. This group of "Dao" has different tones from the first sound to the fourth sound, but the vowel is "ao" and the vowel is the same, so the rhyme of "ao" is stressed.
3. The initials are all "C": Cao, Cao, Cao, Cao. This group of "coarse" tones are different from the first tone to the fourth tone, but the vowels are all "ao" and the vowels are the same, so they are all "ao" rhymes.
4. The initials are all "ch": Chao, Noisy, Copy, Stir-fry and Chao. The tones of this group of "Chao" are different from the first to the fourth tone, but the vowel is "ao" and the vowel is the same, so the rhyme of "ao" is stressed.
5. The initials are all "M": fur, cat, fur, hat and fur. The tones of this group of "Mao" are different from the first sound to the fourth sound, but the vowels are all "ao" and the vowels are the same, so the rhyme of "ao" is stressed.
6. The initials are all "T": Ji, Yi, Dao, Dao and Tao. The tone of this group of "Dao" is different from the first tone to the fourth tone, but the vowel is "ao" and the vowel is the same, so the rhyme of "ao" is stressed.
7. The initials are all "L": Lao, Yu, Lao, Prison and Lao. This group of "Lao" has different tones from the first sound to the fourth sound, but the vowels are all "ao" and the vowels are the same, so they all emphasize "ao" rhyme.
Extended information: Idioms with the rhyme "ao" (that is, the vowels are all "ao") include: growing old together, being good at playing the piano, being boundless, getting along with each other for a hundred years, winning people's hearts, being kind to each other, leading a clean life, being proud of their own interests, being proud of their own achievements, being stubborn and arrogant.