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

The most common answer is lapp (4 letters).

Crossword clue: another word for same

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

lapp 4 letters gen-syn

the language of nomadic Lapps in northern Scandinavia and the Kola Peninsula

sami 4 letters gen-syn

the language of nomadic Lapps in northern Scandinavia and the Kola Peninsula

a person with the same name as another 50% similar → namesake

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

one of the same religion with another. 50% similar → coreligionist