Wiktionary
proliferating
vb. (present participle of proliferate English)
Usage examples of "proliferating".
By 1953, this chain was proliferating in almost every White Castle city.
Also that day, a Texas woman sent Gitchell a book about how cults that engaged in murder were proliferating in America.
The fungus, which had been proliferating inside the lens barrel since their arrival, irising steadily in, had concluded its work.