The word 'downtrends' refers to a situation of decline or decrease in any given scenario. Its antonyms refer to a situation when things are on the rise or an upswing. The antonyms for downtrends include words such as upswing, recovery, improvement, growth, rise, boost, and surge. These words indicate an optimistic and positive outlook towards the situation. For instance, instead of saying that the economy is facing a downtrend, one can say that the economy is in a phase of recovery, indicating a hopeful scenario. Similarly, instead of using the word 'downtrend,' we can use its antonyms to convey an optimistic message regarding any given scenario.