two
Nobuta wo Produce ended on 2005-12-17.
HMAS Ping Wo ended on 1946-06-24.
sword
Asu no Hikari wo Tsukame ended on 2011-09-02.
if its the one I'm thinking then its called heartbeats
why don't you, ive got better things to do answering real questions you won't find 20 words with "wo" because it is the objective particle, no words start with it
wo neng...? 我能...? wo3 ke2yi3 ...? If you are ending a sentence with either of those, you need a "ma" at the end, like "wo neng ma?" or "wo ke yi ma?"
Definitely, it is a valid two-letter word. The only two valid 2-letter words starting with W are WE and WO.
AWOL, Ewok, twos
wo bu zhi dao
One hundred eighty-five thousandths.