Non-dec words

Depending on the alternative spellings that you teach, some words become decodable or non-decodable. If we don't teach the alternative spellings that you can find in grey in this page, the non-decodable words to be taught through the years are: 

Initial words
Advanced words
More words
do, to, today, of, said, says, are, were, was, is, his, has, I, you, your, be, he, me, she, we, no, go, so, there, where, love, come, some, one, two, four, eight, once, friend, school, put, push, pull, full, house, does, goes, door, floor, poor, because, find, kind, mind, behind, child, wild, climb, most, only, both, old, cold, gold, hold, told, every, everybody, even, great, break, steak, pretty, beautiful, move, prove, improve, sure, sugar, eye, could, should, would, who, whole, any, many, clothes, busy, people, water, again, half, money, Mr, Mrs, parents, Christmas.

Numbers, days of week, months are taught as common exception words
accident(ally), actual(ly), address, answer, appear, arrive, believe, bicycle, breath, breathe, build, busy/business, calendar, centre, century, certain, consider, continue, describe, different, difficult, disappear, early, earth, eight/eighth, enough, exercise, experience, experiment, famous, favourite, February, fruit, group, guard, heard, heart, height, history, imagine, interest, island, knowledge, learn, length, library, material, medicine, minute, natural, notice, often, opposite, ordinary, particular, peculiar, popular, position, potatoes, probably, promise, purpose, regular, reign, sentence, separate, special, straight, strange, strength, suppose, therefore, though/although, thought, through, various, weight, woman/women
accommodate, accompany, achieve, amateur, ancient, apparent, appreciate, average, bruise, category, cemetery, communicate, community, competition, conscience, conscious, controversy, convenience, correspond, criticise (critic + ise), curiosity, definite, desperate, determined, develop, dictionary, disastrous, environment, equip (–ped, –ment), especially, exaggerate, existence, explanation, familiar, foreign, guarantee, identity, immediate(ly), individual, leisure, lightning, marvellous, mischievous, muscle, necessary, neighbour, nuisance, opportunity, parliament, persuade, physical, prejudice, privilege, profession, programme, pronunciation, queue, relevant, rhyme, rhythm, sacrifice, secretary, shoulder, signature, soldier, stomach, sufficient, symbol, system, temperature, thorough, variety, vegetable, vehicle, yacht. 

In my opinion the following words are irregular because the alternative spelling is not common enough to become a regularity. They should be taught after the initial non-decodable words and before the advanced ones:  head, bread, meant, instead, read (past tense), chief, field, thief, bear, pear, wear, want, watch, wander, quantity, squash , war, warm, towards , more, score, before, wore, shore, worm, word, work, world, myth, pyramid, mystery, half, calf, unique, school, chord, anchor, character, chrome, laugh, tough, sponge, village, lamb, bomb, crumb, autumn, onion, opinion,  money, grey, prey, survey, donkey, key, trolley, belief, brief, shield, sardine, dough, hoe, toe, beau, gateau, plateau, soup, juice, castle, fasten, listen, whistle, penguin, if, pal, us, bus, yes.