Kenneth G. Wilson (1923). The Columbia Guide to Standard American English. 1993.
salary, fee, honorarium, payment in kind, wage (nn.)
Usually a salary is a rounded-off dollar rate of weekly, monthly, or annual compensation; wages are stated in dollars and cents per hour, per day, or per piece of work; and an honorarium (plural: honoraria or honorariums) is a single payment, often including expenses, for a service rendered, particularly one for which taste or tradition forbid the setting of a precise rate. A fee is a rate charged for a service. Rural clergymen at one time often received payment in kindthat is, in garden produce, other foodstuffs, coal, kerosene, and clothing. See also KIND; REMUNERATE.