Poetry Guide: Pararhyme
Pararhyme, also known as partial or imperfect rhyme is a term devised by the poet Edmund Blunden to describe a near rhyme in which the consonants in two words are the same, but the vowels are different. It is distinguished from half rhyme in that all the consonants should match rather than just the final ones.
Pararhyme is sometimes referred to as double consonance. It is a particular feature of the poetry of Wilfred Owen; see, for example Strange Meeting.