What are the best answers for “another word for underground”?

clandestine, metro, subway, surreptitious, undercover.

How many letters does the top answer for “another word for underground” have?

The most common answer is clandestine (11 letters).

5 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

clandestine 11 letters gen-syn

conducted with or marked by hidden aims or methods

metro 5 letters gen-syn

an electric railway operating below the surface of the ground

subway 6 letters gen-syn

an electric railway operating below the surface of the ground

surreptitious 13 letters gen-syn

conducted with or marked by hidden aims or methods

undercover 10 letters gen-syn

conducted with or marked by hidden aims or methods

another word for about 50% similar → approximately, roughly, some

another word for terms 50% similar → footing

another word for under 50% similar → nether

another word for word 50% similar → phrase