Name for words with same consonant sounds but different vowel sounds

Is there a name for words with the same consonant sounds, but different vowel sounds? For example:

• talk, take
• sit, site
• taught, tote
• bough, bow

My son has been mixing up these sets of words. I'd like to find a list of them for him to practice (we homeschool him), but I don't know what to search for.

Solution 1:

In the context of literary analysis, there are a few applicable terms:

• Matching consonants create consonance.
• Words that nearly rhyme are half rhymes or slant rhymes.
• Pairs where only the vowels vary are pararhymes.

In the context of studying language, John Lawler's suggestion of minimal pair is apt: two words that differ in only a single sound that serves to distinguish them, sometimes subtly.