Words that sound the same may be very confusing, especially if the words are medical in nature. These words are called homonyms, which are words that sound alike but have different meanings. An example of which are, pear (fruit) and pair (a set of two things.)
Homonyms may either be homophones or homographs. They are defined as:
Homophones are types of homonym words that sound the same with have different meanings. However the words have different spellings.
Example: to, two and too