Oxford Dictionaries online lists pneumonoultramicroscopicsilicovolcanoconiosis as a noun. The definition is "an artificial long word said to mean a lung disease caused by inhaling very fine ash and sand dust."
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pneumonoultramicroscopicsilicovolcano is longer . it has 37 letters .as hippopotomonstrosesquippedaliophobia had 36
Maybe 19
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
adverb
what part of speech is work
Sashay is a verb. It means to walk in an exaggerated, showy manner, often with hip swaying.
The word speech is a noun.
Adjective
Yes, conjunction is a part of speech.
i want to know what part of speech is camping