It is concluded that content words are the words that have more than one form. They are distinguished by their inflectional and derivational suffixes and prefixes. There are four major content words: nouns, adjectives, verbs and adverbs. Noun can be identified by two aspects of form: derivational suffixes and inflectional suffixes. Verbs can be identified by their prefixes, suffixes and positions. Adjectives can be identified on the basis of derivational and inflectional suffixes and their positions. Moreover, adverbs can be identified by their derivational suffixes and inflectional suffixes for comparison.