The term 'destroy completely' can be described by a variety of words, such as EXTIRPATE (9 letters), RAZE (4 letters), ANNIHILATE (10 letters), RUIN (4 letters), TOTAL (5 letters), GUT (3 letters), LEVEL (5 letters), ERADICATE (9 letters), ABOLISH (7 letters), ERASE (5 letters), and rootout (7 letters). EXTIRPATE means to remove or destroy completely, while RAZE means to demolish or LEVEL to the ground. ANNIHILATE means to reduce to nothing, and RUIN means to cause destruction or damage. TOTAL means to destroy completely, and GUT means to remove the contents of something. LEVEL means to reduce to the same height or LEVEL, and ERADICATE means to completely destroy or remove. ABOLISH means to put an end to, ERASE means to remove completely, and rootout means to eliminate completely.