butt
The word is profit.
A blade on the end o a rifle is called a "Bayonet".
Bayonet.
barrel
There are no 13 letter words that start with J and end with K.
Some nine letter words that start and end with the letter E are:economizeeffectiveeffluenceelaborateelectrodeeliminateeloquenceemergenceempathizeemphasizeenduranceentourageenunciateepitomizeequitableeradicateevaporateevocativeexcessiveexfoliateexquisite
That is just a slang word. Butt is a common word that just means "end," like the end of a cigarette or a rifle. So the back end of the body, and the word hole makes it more specific that you mean the opening. Thus the opening in the back of the human body.
A suffix is put at the end of a word to change something about the word like its use.
Barrack is a seven lettered word that begins with B and ends with K. A barrack usually refers to a form of military housing.
Rifle Volunteers ended in 2007.
When you add to the end of a word, the addition is called the suffix. Examples:Wonder, wonderful.Dance, dancing.Excite, excitement.
The word at the end of a prepositional phrase is called the object of the preposition. It is the noun or pronoun that the preposition acts upon in the sentence.