clear has 53 distinct synonyms spread across 24 of its 45 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its 4 recorded opposites are bounce, unclear, opaque, cloudy.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
make a way or path by removing objects
“Clear a path through the dense forest”
be debited and credited to the proper bank accounts
“The check will clear within 2 business days”
go away or disappear
“The fog cleared in the afternoon”
make free from confusion or ambiguity; make clear
“Could you clarify these remarks?”
free from payment of customs duties, as of a shipment
“Clear the ship and let it dock”
clear from impurities, blemishes, pollution, etc.
“clear the water before it can be drunk”
sell
“We cleared a lot of the old model cars”
pass an inspection or receive authorization
“clear customs”
make clear, bright, light, or translucent
“The water had to be cleared through filtering”
rid of instructions or data
“clear a memory buffer”
remove (people) from a building
“clear the patrons from the theater after the bomb threat”
remove the occupants of
“Clear the building”
the state of being free of suspicion
“investigation showed that he was in the clear”
5 of the 45 recorded senses carry no synonym, antonym or related term, so they are not shown above. Every sense, with its definition and examples, is on the full entry for clear.
Synonyms, antonyms and the broader and narrower relations for clear come from Princeton University’s WordNet. Full sources and licences.
(especially of a title) free from any encumbrance or limitation that presents a question of fact or law
“I have clear title to this property”
free from clouds or mist or haze
“on a clear day”
easily deciphered
freed from any question of guilt
“is absolved from all blame”