Minimal Pairs
A single phoneme in two words at the same position which when changed can [see page 2, alter] the meaning of the word.
To be a minimal-pair we must have a pair of words that differ in only one segment,
where the segment is in the same position in each word and the two words have
different meanings (not alternative pronunciations).
For example in the words fussy and fuzzy, [s] and [z] are phoneme. Changing [s]
to [z] changes the meaning of the word (and vice versa). See [see page 4, here] for more examples.