Which type of rhyme is present when the words have same ending constant sound but vowel sounds are different?

That type of rhyme is called consonant rhyme or slant rhyme.

Here's why:

* Consonant rhyme: It focuses on the similarity of consonant sounds at the end of words, even if the vowel sounds differ.

* Slant rhyme: It's a more poetic term for consonant rhyme, emphasizing the slightly off-kilter, "near rhyme" quality.

Examples:

* Cat and cot (consonant rhyme)

* Moon and rune (slant rhyme)

* Thin and then (slant rhyme)

These types of rhymes add a subtle musicality and a sense of playfulness to poetry and lyrics.