Tch. Dictionary.com says this, and the Merriam-Webster Online Dictionary says this.

A boat is an ark is a boat is an ark. Lovely linkage for you.

And, excuse me as I break out my own Bible, (Yes, I do own one. Twas my mothers.) it says in Genesis 7:2 that God told Noah to take seven pairs of every "clean" animal ("the male and his female", as it says), and one pair of every "unclean" animal. In Gen 7:3 it says "Of fowls also of the air by sevens, the male and the female". SO, Noah did not take one pair of every "kind" of animal, instead there were many more than you claim.

And finally...in Gen 7:8 it says: Of clean beasts, and of beasts that are not clean, and of fowls, and of every thing that creepeth upon the earth.