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

The most common answer is pigboat (7 letters).

Crossword clue: another word for submarine

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

pigboat 7 letters gen-syn

a submersible warship usually armed with torpedoes

sub 3 letters gen-syn

be a substitute

undersea 8 letters gen-syn

beneath the surface of the sea

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