Modifying a word in its structure (spelling) to convey a different meaning?

Question

Somewhere on the Internet I read the following lines:

Daughter is not equal to tensions. Daughter is equal to ten-sons.

In this sentence the word "tension" is modified to be written as "ten-sons" to produce a positive connotation.

Is there any name to this form of writing, where a word is modified in its spelling/pronunciation to convey a different meaning?

Is it related to "semantic change"?

Answer 1

I would simply call this a pun or a play on words, since the intent is likely humorous.

Interestingly, the Wikipedia article also offers the synonymous term "paronomasia," if you'd like to impress your friends with a new word.