How many letters does the top answer for “connected by a link, as railway cars or trailer trucks” have?

The most common answer is coupled (7 letters).

Crossword clue: connected by a link, as railway cars or trailer trucks

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

coupled 7 letters wn-def

connected by a link, as railway cars or trailer trucks

joined 6 letters wn-def

connected by a link, as railway cars or trailer trucks

linked 6 letters wn-def

connected by a link, as railway cars or trailer trucks