In this book, you will learn the meanings of 875 useful 11-letter words. You will also find the names of the parts of speech they belong to. I have also given synonyms for most of these words. Sample this:

01 — abandonment [n.] — (a). the act of leaving a person, place or thing without intending to return | (b). the act of giving up a practice, a course of action or a way of thinking completely and permanently [synonyms: desertion, forsaking]
02 — accelerator [n.] — (a). the pedal in a car, truck or other vehicle used to press with your foot for controlling the speed of the engine | (b). something that makes a process happen quickly | (c). a machine that is used to make elementary particles move at very high speeds
03 — acceptation [n.] — a particular sense or the generally accepted meaning of a word, phrase or expression
04 — acclamation [n.] — (a). loud, noisy and enthusiastic approval or welcome [synonyms: approbation, commendation] | (b). the act of electing sb using a spoken vote instead of a ballot
05 — acquisitive [adj.] — eager to own to acquire and own money or new possessions (material things) in a greedy way [synonyms: covetous, materialistic]
06 — acrimonious [adj.] — (a). (of an argument, a speech, discussion, behavior, etc.) angry and full of strong bitter, sharp or harsh feelings and words | (b). having a strong unpleasant taste or smell
07 — adventuress [n.] — a woman who enjoys taking risks or is willing to take risks with a view to acquire political power or to get success in a business, sometimes in a dishonest way
08 — adventurism [n.] — a willingness to take risks with a view to acquire political power or to get success in a business, sometimes in a dishonest way
09 — adventurous [adj.] — (a). (of a person) willing to take risks and try new ideas, methods, things or experiences | (b). including new and interesting ideas, methods, things or experiences | (c). full of new, exciting or dangerous ideas, methods, things or experiences [synonyms: audacious, bold, daring, exploratory]
10 — affectation [n.] — insincere, pretentious or unnatural behavior or an action intended to impress other people
11 — affectingly [adv.] — in a manner that produces strong feelings of distress, pity, regret, sorrow, or sympathy, etc.
12 — ambiguously [adv.] — In a manner that can be understood or interpreted in more than one way [synonyms: dubiously, vaguely, puzzlingly]
13 — ambitiously [adv.] — (a). with the intention of becoming extremely successful, rich, powerful, wealthy [synonym: determinedly] | (b). in a way that needs a lot of work, effort, money or time in order to achieve a specific goal because it involves too much of difficulty
14 — amorphously [adv.] — (a). in a manner that has no fixed, regular or distinct shape, design, form or structure [synonyms: formlessly, shapelessly,] | (b). in a way that has no definite character or nature | (c). in a manner that lacks organization [synonyms: unstructured, vaguely]
15 — androgynous [adj.] — partly male and partly female in appearance; having both male and female characteristics; of indeterminate gender [synonyms: asexual, genderless]
16 — anecdotally [adv.] — according to or by means of personal description or observations rather than proven facts
17 — appallingly [adj.] — In an extremely bad way [synonyms: awfully, terribly] | (b). extremely bad or poor
18 — aristocracy [n.] — (in some countries) the people of the...