block

[1]	obstruct , close off , barricade , bar , shut off , hinder , hamper , balk , impede , prevent
[2]	block out , rough out , design , outline , sketch , lay out , plan , mask , screen , blank (out) , erase , eliminate , exclude , blot out , deny
[3]	block (up) , stuff (up) , congest , clog , (Colloq) (Brit) bung up
[4]	barricade , blockade , stop , block off , block up , bar
[5]	obstruct , blockade , hinder , stymie , stymy , embarrass
[6]	stop , halt , kibosh
[7]	jam
[8]	obstruct
[9]	stuff , lug , choke up
[10]	obstruct , obturate , impede , occlude , jam , close up
[11]	parry , deflect
[12]	forget , blank out , draw a blank
[13]	freeze , immobilize , immobilise

[1]	piece , chunk , hunk , lump , slab , stump , brick , cube
[2]	bar , city block , obstacle , obstruction , hindrance , stumbling-block , deterrent , impediment , barrier
[3]	cube
[4]	mental block
[5]	pulley , pulley-block , pulley block
[6]	engine block , cylinder block
[7]	blockage , closure , occlusion , stop , stoppage
[8]	auction block
[9]	blocking