The word "bats" has 2 morphemes. A morpheme is the littlest syntactic unit in a dialect. At the end of the day, it is the littlest important unit of a dialect. The phonetics field of concentrate committed to morphemes is called morphology. A morpheme isn't indistinguishable to a word, and the primary distinction between the two is that a morpheme could possibly remain solitary, while a word, by definition, is unattached.
