grammar
noun
1.
the study of the way the sentences of a language are constructed; morphology and syntax.
2.
these features or constructions themselves: English grammar.
3.
an account of these features; a set of rules accounting for these constructions: a grammar of English.
Nay, good sir, you do wrong me. I pointed out that the two words are similar, but have difference in meanings. Thou mayest let loose thy ire on this poor servant of the language; but I refuse to lose this battle!