Are inoculation and vaccination considered the same thing ?

They are close to the same (and each word has a verb form and a noun form: the forms you presented, each ending in "tion" are nouns. The "ate" forms are verbs.) Innoculation is the introduction of something to provide immunity or other protection from disease, and the term also has a more colloquial form, as in Pres Bush likes to say everything is Clinton's fault, to innoculate himself from criticism. Vaccinate is slightly more specific, meaning the introduction of a vaccine, which is a particular kind of innoculation, namely protein derived from a pathogen (germ), to which the body will respond by producing antibodies. There are other kinds of innoculations besides vaccines, such as gamma globulin.

PS: the reference to nouns and verbs was because there was a post that answered the original question and included an incorrect (but not significant) statement that one was a noun and one was a verb. That answer has been removed, presumably by the moderator (unnecessarily); so my discussing nouns and verbs seems a little weird, absent the original context.