Summate is a 7 letter English word. It's valid Scrabble word worth 11 points. It's valid Words with friends word worth 14 points.
You can make 179 anagrams from letters in summate (aemmstu).
First recorded in 1895-1900; back formation from summation
They accumulate in time, finally they summate, and exercise their influence even at the beginning of the service.