stud
/stʌd/
A male animal, especially a stud horse (stallion), kept for breeding.
A female animal, especially a studmare (broodmare), kept for breeding.
(also by extension) A group of such animals.
An animal (usually livestock) that has been registered and is retained for breeding.
A place, such as a ranch, where such animals are kept.
A sexually attractive male; also a lover in great demand.