Answer:
3 Letters:
and, ant, arc, are, arm, art, ate, cad, cam, can, car, cat, cee, cod, col, con, coo, cot, dad, dal, dam, dee, del, den, did, die, dim, din, doc, doe, don, dot, ear, eat, eel
4 Letters:
Code, calm, cold, colt, dorm, idea, idol, tore, torn, toad, need, tree, trim, trial, told, moon, neat, need
5 Letters:
ocean, radio, older, micro, melee, dance, camel, clear, canon, crime, canal
15 Letters:
antitraditional, codetermination, contraindicated, interelectronic, omnidirectional, reaccreditation, redetermination, teratocarcinoma
