Noun
1. roadblock
2. barrier, barrier
Verb
1. block
2. blockade, stop, block off, block up, bar, obstruct, obturate, impede, occlude, jam, block, close up, obstruct
3. obturate, impede, occlude, jam, block, close up, barricado
3. obstruct, obturate, impede, occlude, jam, block, close up