tenterhooks

Tenterhooks
related: english

Explanation
The OED says it is now a rare or obscure saying, but people also used to say they were “on tenters” or “on the tenter” to mean the same thing as “on tenterhooks.” So remember, You aren't on tenderhooks, you're on tenterhooks. Jan 9, 2014 http://www.quickanddirtytips.com/education/grammar/tenterhooks-or-tenderhooks

Usage
http://www.theaustralian.com.au/sport/opinion/wayne-smith/rebels-and-force-want-a-super-rugby-commission/news-story/39bbdcd2225d52b8254f9993b88a978e