centre of mass Synonyms

center of mass centre of gravity center mass big complication big challenge basic task basic purpose basic premise basic objective basic necessity basic goal basic aim big concern big difficult biggest target biggest goal biggest aim big worry big stumbling big prob big obstacle big headache big dilemma mass centre gravity centre gravity center basic question big problem big difficulty key issue centre of inertia Central Point center of attention center of gravity basic principle mass center crucial problem big question biggest problem fundamental question basic mission main focus major problem major issue main problem important issue centroid