Block
Block noun - Something that makes movement or progress difficult.
Usage example: constant bickering that is only a block to the completion of the project
Obstacle is a synonym for block in obstruction topic. In some cases you can use "Obstacle" instead a noun "Block", when it comes to topics like help, handicap, impediment. popular alternative
Obstacle
Obstacle noun - Something that makes movement or progress difficult.
Usage example: stumbling on all the obstacles along the path
Block is a synonym for obstacle in obstruction topic. You can use "Block" instead a noun "Obstacle", if it concerns topics such as impediment, help, barrier, handicap. popular alternative
Mutual synonyms
How words are described
Both words in one sentence
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From episode 10 onwards, they've built entire obstacle courses for the guys to compete in, and the winner gets that gold block tower as bragging rights.
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Invisible Block: In Koha-Ace, Kohaku gets hit by one after trying to jump over an obstacle.
Source: Anime / Carnival Phantasm - Alternately, it can be combined with a Block Puzzle, where the player can move normally (without sliding) but pushing a block causes it to slide frictionlessly until it hits an obstacle, and the goal is to push blocks to hit a Pressure Plate (bridge a gap, etc.) somewhere in the room.
Source: Frictionless Ice
Cite this Source
Obstacle and Block. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/block/obstacle
Block & Obstacle. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/block/obstacle>.
Obstacle or Block. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/block/obstacle.
Google Ngram Viewer shows how "block" and "obstacle" have occurred on timeline