The term 'Big Name in Pest Control' refers to two well-known companies in the pest control industry: Orkin (5 letters) and DCon (4 letters). Orkin is a pest control company that has been in business since 1901 and is now one of the largest pest control companies in the world. DCon is a brand of pest control products owned by Reckitt Benckiser, a British multinational consumer goods company. Both Orkin and DCon are widely recognized for their effective pest control solutions.