Badgrammar

2 clues
What this clue have
English teacher's annoyance
Similar answers:
Badgrades
Badgrammar
Bammargera
Chelseagrammar
Daghammarskjold
Dammar
Erroringrammar
Gammaradiation
Gammaray
Gammarayburst
Gammarays
Grahammarschool
Grammar
Grammarchecker
Grammarian
Grammarnazi
Grammarriottalk
Grammars
Grammartest
Grimmergrammar