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're supposed to say I have the right to remain silent. Nobody said I have the right to remain silent! You have the right to remain silent. What you lack is the capacity. I must hold on before I, too, go totally mad. Shrek? Donkey? Too late. Gingy! Pinocchio! (..)2004 Shrek 2