common trade common tradition common training common trait common traits common transit common transit procedure common translation common transport common transport policy common travel common travel area common treatment common treatments common tree common trees common trend common trends common trick common trigger common triggers common tumor common type common types common types of cancer common uncommon common underlying common understanding common unit common units common usage common use common use cases common used common user common uses common utility common value common values common variable common variant common variants common variation common varieties common variety common version common versions common video common view common views common violations common viral common virus common viruses common visa policy common vision common visual common vocabulary common voice common wall common warning common warts common waste common water common way common ways common wealth common weapon common web common website common weed common welfare common wheat common white common will common wire common wisdom common wish common with age common with him common with me common with other common witness common woman common wood common word common wordpress common words common work common working common world common worldwide common year common years common-law common-law marriage common-law partner common-law partners common-law relationship