Battleship
noun
An army warship is a battleship. Did you sink it? Oh oh! You sunk my 軍艦!
ぐんかん
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
軍艦プラモの専門店を開く予定なんだよ。
I’m going to open a specialty shop for plastic battleship models.