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]
(..) You are sick and I don't think you can get well here. Jesus, when am I gonna find a fucking medication that works? She has a pretty severe lack of surfactant in her lungs, but she is breathing steadily with a ventilator. I wanna see her. Why hasn't somebody brought her in? (..)2005 TvShow: Six Feet Under Title: Everyone's Waiting Season: 5 Episode 12