The plural Variation is more common according to Google ngram. It is also utilized for example in Cambridge's dictionary. Look through nattering nattily natto natty natural natural burial natural company yr natural childbirth natural constituency #randomImageQuizHook.filename #randomImageQuizHook.isQuiz Exam your vocabulary with our entertaining graphic quizzes Ayurveda says that both... https://www.cureayu.com/blogs/mental-health/reduce-stress-and-improve-sleep-quality