sounds that differentiate in meaning; smallest segmental unit of sound employed to form meaningful contrasts between utterances.
one of several surface realizations of a phoneme; one of a set of multiple possible spoken sounds used to pronounce a single phoneme.
if sounds can't occur in equivalent environments; found in opposite environments
found in same environment, with different meaning; pat vs bat
set of distinct words that differ in one sound
occur in same environment; don't distinguish meaning; two (or more) sounds or forms appearing in the same environment without a change in meaning and without being considered incorrect by native speakers. wait, wait