be short of, not have, be deficient in, need, require
be without
Inaction??
Lack, want,
lack dearth
incommunicado
lethargic
Harsh truth
lacking skill
Lazyness
to lack to deprive to sacrifice
Well, darling, another word for 'lack of interest' is 'apathy.' It's when someone couldn't care less if their hair was on fire. So, if you're feeling apathetic, just remember that you're not alone in the 'couldn't care less' club.
Another word for want is long. You can also go to www.thesaurus.reference.com for other synonyms.