Pointless
useless>pointless
necessary
obsolesce
necessary necessary
A 7 letter word meaning good for nothing is useless.
The nine letter word is nectarine.
The nine letter word is tolerable.
wot is a nine letter word for a alian
useless
The word "futile" fits the criteria for a 9-letter word meaning useless with the vowel sound oi or oy.
Waterhose is a nine letter word starting with the letter W!
The nine letter word is overdraft.