Obsolete means no longer produced or used; out of date. A Dead language is a language no longer spoken, which is a related but more specific term. Ambiguous means having more than one meaning. Ancient means from a distant past.

Posthumous means occurring, awarded, or appearing after the death of the originator. An orphan is a child whose parents are dead. Anonymous means unnamed. Infanticide is the murder of an infant.

Sanguinary means involving or causing much bloodshed. Decisive means settling an issue. Fatal means causing death. Posthumous means occurring after death.

Navigable means (of a waterway) able to be sailed on by ships or boats. Aquatic means relating to water. Transparent means capable of being seen through. Sanguinary means involving bloodshed.

An Honorary position is one held without financial reward. A Sinecure is a position requiring little or no work but giving salary. Mercenary means motivated by money. Voluntary means done of one's own accord, which is similar but 'Honorary' is the specific term for a post.

Fatal means causing death. Sanguinary means involving bloodshed. Panacea is a remedy for all diseases. Contagious means spread by contact.

A Maiden speech is the first speech made by a new member of a legislature or other assembly. Extempore means done without preparation. Original means new or initial. Voluntary means done of one's own accord.

Extempore means spoken or done without preparation. A Maiden speech is the first speech of a speaker. Anonymous means without a name. Voluntary means done of one's own accord.

A Drawn game is a game that ends with the scores level; a tie. Decisive means having a clear result. Alternative means a choice between two things. Equal means being the same in quantity, size, degree, or value.

Decisive means settling an issue or producing a definite result. Sanguinary means involving or causing much bloodshed. Fatal means causing death. While it might be a 'final' battle, 'decisive' specifically carries the meaning of settling the controversy.