noun

the quality of being rudimentary or makeshift; primitiveness.

he criticises the crudity of design

primitiveness,simplicity,oversimplicity,roughness,inaccuracy,lack of refinement,lack of sophistication,rudeness,vulgarity,suggestiveness,raciness,earthiness,bawdiness,blueness,smuttiness,smut,lewdness,salaciousness,licentiousness,ribaldry,seaminess,dirtiness,filthiness,dirt,filth,boorishness,coarseness,uncouthness,indecency,obscenity,indelicacy,crassness,tastelessness,offensiveness,naughtiness,raunchiness,sleaziness,steaminess,porn,fruitiness,sauciness,gaminess