Homonyms

--Antonyms are word pairs with opposite meanings. They can be words differentiated by a prefix (original/unoriginal, respect/disrespect) or can comprise two completely different words (old/young, big/small).
--Synonyms are words that have the same or nearly the same meaning. Some words have more than one group of synonyms. For example: big - large(extensive, huge, substantial), grown-up (adult, elder, grown).
--Homophones are groups of words that are pronounced the same way but which differ in meaning or spelling or both. For example: bare/bear,to/too/two.
--Homographs are groups of words that are spelt the same way but which have different meanings. They may or may not be pronounced differently.For example: sow (female pig) and sow (plant seeds), nail (as in finger nail) and nail (used with a hammer).