Grammatical words and lexical words Grammatical words are those expressing grammatical meanings, like conjunctions,prepositions,and pronouns. rLexical words are those having lexical meanings,i.e.referring to substance,action and quality(性质)， like nouns,verbs,adjectives and adverbs.Grammatical words and lexical words Grammatical words are those expressing grammatical meanings, like conjunctions, prepositions, and pronouns. Lexical words are those having lexical meanings, i.e. referring to substance, action and quality(性质), like nouns, verbs, adjectives and adverbs