cardiovascular, ridiculous, college, encyclopedia, television, tremendously.
baccalaureate
That is the correct spelling of "hard" (solid, substantial). *For "hard" (difficult) spelling words, see the related questions.
The correct spelling of the adjective is difficult (hard, not easy).
pitiful
Math's (as in, "math's a difficult subject for some people").
Words containing such a spelling include:tubelubesuperpurelureallurebureaucurepleasureendure
Inverted words: Interrogative sentences. Unclear pronouns: Indefinite pronouns Variable spelling: some nouns have alternate spelling
incorrect
Because given all the words that the English borrowed from their conquerors, and all those they conquered, the spelling is not phonetic and it is not regularized either.
Technology program such as Microsoft Word allows people to use spell check to insure that words are speller correctly. Some programs will allow words to be looked up and the proper spelling provided. This will help people learn the correct spelling of words.
Clucky, ducky, mucky are some words with the same spelling pattern as lucky.
The correct spelling is "difficult."