Alliteration is a well-known form of consonance.
It refers to the repetition of consonant sounds, but only in the stressed part of a word. For example, “The Wind in the Willows” is an example of alliteration because the ‘w’ sound occurs in the stressed part of the words.
“The Catcher in the Rye,” on the other hand, is an example of consonance but not of alliteration because the ‘r’ sound is repeated in one unstressed incidence (catcher) and in one stressed incidence (rye).