Synonyms of the word

introductory

• adj. introducing; giving a preview or idea of.

basic

• adj. Necessary, essential for life or some process.
• adj. Elementary, simple, fundamental, merely functional.
• adj. (chemistry) Of or pertaining to a base; having a pH greater than 7.
• adj. (slang) Unremarkable or uninteresting; boring; uncool.
• n. A necessary commodity, a staple requirement.
• n. An elementary building block, e.g. a fundamental piece of knowledge.
• n. (military) Basic training.

first

• adj. Preceding all others of a series or kind; the ordinal of one; earliest.
• adj. Most eminent or exalted; most excellent; chief; highest.
• adv. Before anything else; firstly.
• n. (uncountable) The person or thing in the first position.
• n. (uncountable) The first gear of an engine.
• n. (countable) Something that has never happened before; a new occurrence.
• n. (countable, baseball) first base.
• n. (countable, Britain, colloquial) A first-class honours degree.
• n. (countable, colloquial) A first-edition copy of some publication.
• n. A fraction of an integer ending in one.
• n. (obsolete) Time; time granted; respite.

opening

• v. present participle of open.
• n. An act or instance of making or becoming open.
• n. Something that is open.
• n. An act or instance of beginning.
• n. Something that is a beginning.
• n. A vacant position, especially in an array.
• n. An opportunity, as in a competitive activity.
• adj. (cricket) describing the first period of play, usually up to the fall of the first wicket; describing…

preceding

• adj. Occurring before or in front of something else, in time, place, rank or sequence.
• v. present participle of precede.

prefatorial

• adj. prefatory.

prefatory

• adj. introductory, preliminary, serving as a prelude or preface.