imprecision [imprecisions](lack of precision) noun [UK: ˌɪm.prɪ.ˈsɪʒ.n̩] [US: ˌɪm.prɪ.ˈsɪʒ.n̩]
inaccuracy [inaccuracies](incorrect calibration of a measuring device, or incorrect use; lack of precision) noun [UK: ɪn.ˈæ.kjə.rə.si] [US: ˌɪ.ˈnæ.kjə.rə.si]