They called it a comet, 'for lack of' a better term/word. [=because they could not think of a better term/word for it]
His honesty, or 'lack thereof', is the real problem. [=the real problem is his lack of honesty]
There was 'no lack of' interest in the proposal. [=there was much interest in the proposal]
(..) - I'm not sure. I have. Whole class. - Did you finish your picture diary? - Not yet. And your digital contact sheet? I lack. But it did not take long. "Not yet." "I lack." The time at darkroom is extracurricular. Indeed, nowadays (..)2014 Boyhood
(..) #We will have to accept it. I thought you were a musician. I am, but ... Life is expensive, you know. You have to be responsible. #What do you think? Hey, you! What a lack of respect! And the redhead in the bowling alley? #Yeah, what's up? - You know her well? - We've seen a few times. (..)2014 Boyhood