In this book, you will learn the meanings of 1225 useful 12- to 14-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. "Letter Count" has been mentioned in the bracket after each and every word. Sample this:

01 — abominableness [14] [n.] — the state or quality of being extremely bad or unpleasant and causing a strong feeling of dislike or disapproval [synonyms: monstrousness, repulsiveness]
02 — abstemiously [12] [adv.] — in a sparing manner, avoiding too much in enjoyable activities such as eating food or drinking alcohol
03 — abstractedly [12] [adv.] — without paying attention to what is happening around you because you are thinking deeply about sth else; [synonyms: absentmindedly, inattentively, distractedly]
04 — abstractionism [14] [n.] — the principles that the mind obtains concepts by abstracting them from concepts it already has, or from experience.
05 — abstractionist [14] [n.] — a person who produces abstract works of art || [adj.] — producing abstract works of art
06 — acquisitively [13] [adv.] — in a manner that shows eagerness to own to acquire and own money or new possessions (material things) in a greedy way [synonyms: graspingly, covetously, materialistically]
07 — acrimoniously [13] [adv.] — (of an argument, a speech, discussion, behavior, etc.) in an angry manner or in a bitter, sharp, harsh manner of language or tone
08 — adaptability [12] [n.] — (a). the quality of being able to adjust or be adjusted to deal with new and different situations or conditions [synonym: flexibility] | (b). the quality of being able to be modified or suited for a new use or purpose
09 — adjectivally [12] [adv.] — as, or in the manner or way of, an adjective
10 — adulterously [12] [adv.] — relating to a physical relationship (intercourse) between a married person and sb who is not their spouse or partner [synonyms: disloyally, treacherously]
11 — advantageous [12] [adj.] — good, useful, helpful or favorable in a particular situation [synonyms: beneficial, gainful]
12 — advantageously [14] [adv.] — in a manner that is good, useful, helpful or favorable in a particular situation [synonyms: beneficially, constructively, gainfully]
13 — adventitious [12] [adj.] — happening by chance or accident; not planned or designed
14 — adventitiously [14] [adv.] — in a manner that is happening by chance or accident; in a manner that is not planned or designed
15 — aggrandizement [14] [n.] — an increase in the power, wealth, importance or status of a person or country [synonyms: enhancement; extension]
16 — alliteration [12] [n.] — repetition of the initial letter or sound at the beginning of words in a sentence
17 — amateurishly [12] [adv.] — in a manner that is done incompetently, inexpertly or unskillfully [synonyms: incompetently, unprofessionally]
18 — ambassadorial [13] [adj.] — belonging to a high-ranking official, who is representative to a foreign country [synonym: diplomatic]
19 — ambassadress [12] [n.] — a high-ranking female official, who is representative to a foreign country; a female ambassador [synonyms: diplomat, envoy]
20 — ambidextrous [12] [adj.] — (a). able to use the right and left hands equally well | (b). (of a tool or instrument) designed to be used by right-handed and left-handed people with equal ease
21 — ambidextrously [14] [adv.]...