Subcycle is a term used in various fields to denote a shorter cyclic repetition of a larger cycle. However, there are several synonyms that can be used in place of this word, depending on the context and the intended meaning. For instance, in computing, the term 'substep' or 'subroutine' may be used to refer to a smaller cycle within a larger process. In the field of materials science, 'microcycle' or 'nanocycle' may be used to describe a smaller repetition within a larger cycle. In the context of biological systems, terms like 'subrhythm' or 'subfrequency' may be used to denote shorter oscillations within larger biological rhythms. Overall, these synonyms provide a more precise and comprehensive description of smaller cycles within larger processes, making them useful for scientific research and analysis.