Main Difference
The main difference between Allspice and Clove is that the Allspice is a species of plant, allspice and Clove is a species of plant.
Allspice
Allspice, also called pimenta, Jamaica pimenta, or myrtle pepper is the dried unripe fruit (berries, used as a spice) of Pimenta dioica, a midcanopy tree native to the Greater Antilles, southern Mexico, and Central America, now cultivated in many warm parts of the world. The name “allspice” was coined as early as 1621 by the English, who thought it combined the flavour of cinnamon, nutmeg, and cloves.
Several unrelated fragrant shrubs are called “Carolina allspice” (Calycanthus floridus), “Japanese allspice” (Chimonanthus praecox), or “wild allspice” (Lindera benzoin). “Allspice” is also sometimes used to refer to the herb costmary (Tanacetum balsamita).
Clove
Cloves are the aromatic flower buds of a tree in the family Myrtaceae, Syzygium aromaticum. They are native to the Maluku Islands (or Moluccas) in Indonesia, and are commonly used as a spice. Cloves are commercially harvested primarily in Bangladesh, Indonesia, India, Madagascar, Zanzibar, Pakistan, Sri Lanka, and Tanzania. Cloves are available throughout the year.
Allspice (noun)
A spice; the dried and ground unripe fruit of noshow=1, thought to combine the flavours of several spices, such as cinnamon, nutmeg and cloves.
Allspice (noun)
, an evergreen tree of tropical America with aromatic berries.
Clove (noun)
A very pungent aromatic spice, the unexpanded flower bud of the clove tree.
Clove (noun)
A clove tree, of the species Syzygium aromaticum (syn. ver=161207), native to the Moluccas (Indonesian islands), which produces the spice.
Clove (noun)
An old English measure of weight, containing 7 pounds (3.2 kg), i.e. half a stone.
Clove (noun)
Any one of the separate bulbs that make up the larger bulb of garlic