ranging — the extent to which or the limits between which variation is possible: the range of steel prices; a wide range of styles.
Three-syllable rhymes
sound ranging — a method for determining the distance between a point and the position of a sound source by measuring the time lapse between the origin of the sound and its arrival at the point.
unchanging — to make the form, nature, content, future course, etc., of (something) different from what it is or from what it would be if left alone: to change one's name; to change one's opinion; to change the course of history.