While attempting a painting in oils (Irouléguy) I'm not going to give this up. :-) My Concise Oxford Dictionary (1964) says of assonance that the vowels must be the same but not necessarily the consonants, this being the partial correspondence you mention. Since it's vowels we're talking about I claim victory, virtue and points, and what do points mean? Derailments.
Are the three intermediate weeks What I want to know is, how did it realise I had spent so long thinking of a first line that Darren beat me to it and point it out?