Some eight letter words with the third letter B are:
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debt
Some eight letter words that start with B and end with P are:backdropbackstopbookshopbullwhip
4 letter words with the third letter b: * cube * tube * mabe (a type of pearl) * lube * jibe * gibe
Disturb, washtub.
cobweb, bubble, nubile, rebuff, submit, goblet