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

The most common answer is erse (4 letters).

Crossword clue: another word for gaelic

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

erse 4 letters gen-syn

any of several related languages of the Celts in Ireland and Scotland

goidelic 8 letters gen-syn

any of several related languages of the Celts in Ireland and Scotland

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