serge / surge [sɜrʤ]
serge – n. – a durable twilled woollen or worsted fabric used in both clothing and upholstery
surge – n. & v. – n. – 1. a sudden onset or outburst; 2. a high rolling swell of water; 3. a rapid increase in price, power etc.; 4. a growing strain of music; v. – 1. rise and move forward like a great wave; 2. accelerate with sudden speed; 3. increase suddenly and dramatically