Manifestly is an adverb which refers to something that is clearly evident, observable or obvious. There are various synonyms that can be used in place of the word manifestly such as evidently, clearly, markedly, unquestionably, conspicuously, undeniably, and palpably. These words all convey a sense of something that is easily observable or clearly noticeable. Additionally, substitutes for manifestly include blatantly, explicitly, unmistakably, and transparently, which carry a more forceful connotation that the action or happening is not to be ignored or denied. Careful consideration of the context of the usage can help to choose the most appropriate synonym for manifestly.