Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Players can tell when they need a hook because a hook-shaped symbol will appear on the screen when they get close to a material that needs it, and they'll need to hold the action button down until it comes free.
Source: https://gamerant.com/raft-how-to-get-scrap-and-stone/