The compounds in which the halogen atom is bonded to the sp $^{2}$ hybridised carbon atom of an aromatic ring are aryl halides.
The compounds in which the halogen atom is bonded to the sp $^{2}$ hybridised carbon atom of a carbon-carbon double bond are vinyl halides.
e.g., $CH _{2}= CH - X$
The compounds in which the halogen atom is bonded to the $sp ^{3}$ hybridised carbon atom which is further bonded with two alkyl groups and one hydrogen atom are secondary alkyl halides.