One Word Substitution

2341. A River on which ships can sail.

Navigable

2342. A battle causing log bloodshed .

Sanguinary battle

2343. A child born after the death of its father.

Posthumous child

2344. A word no longer in use.

Obsolete word

2345. A word which has the meaning of another.

Synonymous

2346. A word which has the opposite meaning of another.

Antonym

2347. Service offered by a man of his own accord .

Voluntary

2348. The motive of getting some money.

Mercenary

2349. A choice between two things.

Alternative

2350. The biography of a person written by himself.

Autobiography