The longest word in the english dictionary is the famous disease casued by the inhalation of volcanic ashes, silica, etc.:
Pneumonoultramicroscopicsilicovolcanoconiosis
And the longest word in any language, doesn't belong to any specific language, because it's a scientific name. This is the scientific name of titin. This word, has amazingly 189,819 letters.
I'm torn between the first and last sentence, "to work" in the 1st and, "to build" in the last. They both seem to appear as infinitives and direct objects.