The antonyms for the word "decrescences" are the terms "growth," "upward trend," and "increase." These words represent the opposite of the concept of decrescences, which is the gradual decrease of something over time. Growth refers to the gradual increase of something over time, such as the growth of a business or the increase in the population of a city. Upward trend refers to a positive progression, such as the trend of an economy or the trend of a company's profits. Increase refers to a measurable uptick in a specific quantity, such as an increase in sales revenue or an increase in the stock market.