Masai.
Cow in Latin is spelled as Bos primgenius
calve
muley
The answer to this riddle is the letter W.Woman begins with the letter W (at the front of the word) and cow ends with the letter W (at the back/end of the word).
Cow I believe.
dog cow mop cot
One is a three letter word and the other is a five letter word. A cow eats grass, whereas yeast is used to raise bread and ferment beer, (I'm pretty sure a cow can't do either of these!!!)
Elsie
pig, cow, ewe,
Ox or oxen
scare, bully, harry, hound