Etc. is used in writing so often that the meaning and spelling are often confused. The correct full spelling of etc. is Et cetera not excetera. But pronunciation of etc. has been butchered so that for some reason people put an “x” instead of a “t” in the word. Apparently, it is also acceptable to make a single word of the phrase giving us etcetera, a noun.
Et cetera or etcetera is used at the end of a list to indicate that there are other examples of items that are similar but not included. It can also be used to indicate that there are items to follow that are too tedious to list.
Lucy went to the grocery store and picked up some apples, lemons, bananas, etc. Rarely do we see it spelled out. It would also be correct to say that: Lucy went to the grocery store and picked up some apples, lemons, bananas, etcetera.
Howbeit tricked us because we might have classified it as slang. But it is an acceptable word that is actually a contraction of how-be-it. Howbeit is an adverb and a contraction, and can be substituted for nevertheless, also a contraction.
Used in a sentence as a contraction we might say: Our vacation is Aruba was great, howbeit much too short. As an adverb one might say: I have never tried hang gliding; howbeit, I think it would be both frightening and exhilarating.