What word has four consecutive letters in it?

It is called a four-letter Word. You may be going for tetragrammaton, which does mean "four letters" in Greek, but this Word is usually reserved for a special Hebrew Word which is the name of the deity and from which has been removed all indicators of the original vowel sounds. As a result the original pronunciation of the Word has not been preserved. This was done out of respect for the name, and the desire to keep the name holy, or separate from worldly contamination. The tetragrammaton is often rendered Adonai, Elohim, Jehovah or Yahweh in various translations of the Hebrew scriptures. Jehovah and Yahweh are attempts to restore the name to something like its original form, from different approaches to scriptural scholarship.

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