The term 'to an excessive degree' can be expressed in four different ways, each with a different number of letters. The first is 'UNDULY' with 6 letters, which means 'in an improper or unfair manner'. The second is 'OVERLY' with 6 letters, which means 'EXCESSIVELY'. The third is 'OBSCENELY' with 9 letters, which means 'in an offensive or shocking manner'. The fourth is 'adnauseam' with 9 letters, which means 'to the point of nausea or disgust'. All of these words describe something that is done to an excessive degree.