How many letters does the top answer for “the condition or practice of having more than one spouse at a time” have?

The most common answer is polygamy (8 letters).

Crossword clue: the condition or practice of having more than one spouse at a time

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

polygamy 8 letters wn-def

the condition or practice of having more than one spouse at a time

the practice or state of having only one spouse at a time 56% similar → monogamousness, monogamy

having more than one husband at a time 50% similar → polyandrous

having more than one wife at a time 50% similar → polygynous