How many letters does the top answer for “of a building having more than one level” have?

The most common answer is multilevel (10 letters).

Crossword clue: of a building having more than one level

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

multilevel 10 letters wn-def

of a building having more than one level

having more than one nucleolus. 50% similar → polynucleolar

having more than one story 50% similar → multistoried, multistory

having one or more sepals. 50% similar → sepaled