Final answer:
Most corticosteroid medications end with the suffix '-one', and they are used to treat a variety of conditions including allergies.
Step-by-step explanation:
The suffix commonly found at the end of most corticosteroid names is '-one'. These medications include a variety of steroid hormones produced by the adrenal cortex, such as mineralocorticoids, glucocorticoids, and androgens. These compounds are used to treat a range of conditions, including allergies and are often found in cold and allergy medicines.