Answer
1. Pneumonoultramicroscopicsilicovolcanoconiosis synonym is respiratory disease.This noun means an type of disease that affects the lungs and it is caused by breathing very fine ash and sand dust. This dust can contain fine particles of silicate and quartz which are microscopic grains. The disease can show symptoms of bronchitis conditions.
2. Antidisestablishmentarianism synonym is anti-secularism. The word mean a movement that was against the separation of church and state. The separation of Church from the state required the church business to be conducted separately from state business and vice versa. Thoman Jefferson wrote the first letter that carried this message to the Danbury Baptists to explain how the wall of separation should be removed to end the misunderstanding of the concept .The main idea was to stop state business out of the business of the church and not to prevent the church from participating in state business.
3. Incomprehensibility synonym is unfathomable. It is used in a sentence to mean an idea, concept, activity or process which is not easy to understand. It can mean something that does not penetrate easily into the mind. A concept in medicine can be described as incomprehensible if it uses technological terms to explain an application in human anatomy.
4. Sesquipedalianism synonym is pretentious. It means a very long word. In a sentence for example can be identified by checking the amount of syllables in the word. An example of a sentence can be: The Professor of literature loved words, so he occasionally used many sesquipedalian words when lecturing in all the classes.