The word "inspiration" is commonly used to describe a source of motivation or creativity. However, there are many other words that can be used to convey the same meaning. For example, "stimulus" or "impetus" are both synonyms that can refer to something that sparks an idea or stimulates creativity. "Incentive" and "encouragement" are other words that can be used to describe a motivating factor. Additionally, "spark", "boost" and "kickstart" are all words that can be used to convey the idea of inspiration. Regardless of the word used, the purpose is always the same - to describe something that ignites a creative spark or motivates someone to action.