oxen - eg. a team of oxen pulled the plough
Buffalos
Shelves
Mitochondria
cargoes or cargos
sheep, it doesn't change.
The plural of activity of activities.
Children or kids
Crises -- pronounced krahy- - seez
Successes is the plural form of the noun success.
phenomenons; for example, they were hit with many phenomenons. :) hope this helpss :D
ox is a collective noun. the female of ox is 'cow'. the male of ox is 'bull'.
An ox was all alone in a field. One ox met another ox. They were no longer an ox and another ox but had become a pair of oxen.