Antonyms for the phrase "spiral oblique or alternating cleavage" may include straightforward, uniform, or symmetrical. These antonyms describe a more predictable and uniform pattern, rather than the complex, spiraling pattern that "spiral oblique or alternating cleavage" suggests. Other antonyms for this phrase could include linear, parallel, or aligned. These words are used to describe a straight, organized pattern, rather than the twisting, unpredictable pattern of spiral oblique or alternating cleavage. By understanding these antonyms, one can better appreciate the unique and fascinating nature of spiral, oblique, or alternating cleavage in natural formations such as crystals, minerals, or rocks.