The word 'inflator' refers to a device used to pump air or gas into something in order to increase its size or pressure. Some common synonyms for 'inflator' include 'air pump', 'tire pump', 'balloon pump', 'compressor', and 'inflation device'. These words can be used interchangeably depending on the context in which they are being used. For instance, an air pump could be used to inflate a pool float, while a tire pump may be used to inflate a car's tires. Compressors are commonly used in industrial settings to inflate larger objects or to provide consistent pressure to a system. Overall, there are several options available when referring to an 'inflator', each with their own unique features and uses.