The technical terms used in phonics are very few, anyway.
phoneme - the smallest sounds which a word can be broken down into (some people might add that deleting/adding a phoneme would alter the meaning of a word. e.g take the /k/ sound from 'cat' and you're left with 'at')
grapheme the letter or group of letters we use to represent a phoneme in writing
Graphemes can be:
graphs = 1 letter, b, s etc
digraphs = 2 letters, sh, th etc.
tri (or tetra)graphs = 3 letters, igh
quadgraphs = 4 letters, aigh, eigh (i'm a bit unsure of this one...it might be 'quadragraph')
The last two terms are rarely used
sounding out =working through a written word assigning a phoneme to each grapheme
blending = running together the sounded out phonemes, in the order in which they occur in the word, to produce the spoken word (can be done out loud or silently)
segmenting = mostly used to describe breaking the spoken word into its component phonemes before spelling it. Sometimes used to describe 'sounding out' (which is, after all, much the same thing in reverse)
decodable = usually used to describe books or text which contain only the graphemes children have learned or are learning. Used for practising the application of phonics knowledge and skills.
sight word = in the phonics teaching context should refer to a word which has been sounded and blended so often that it is secure in long term memory and can now be read 'at sight'.
I make that 9 common (11 if you count the two rarely used terms for graphemes) 'technical' terms. Not enough to make excessive cognitive demands on most adults or children, surely?
And many teachers substitute the word 'sound' for 'phoneme' and 'sound spelling' for 'grapheme'.
I hope this is helpful for those who think there are too many technical terms, or who are puzzled by them
(P.S if phonics colleagues think of more please correct me 
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