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... ADECAGON ... (22 elements)

en (5) : ENNEADECAGON · HEPTADECAGON · HEXADECAGON · OCTADECAGON · PENTADECAGON

es (5) : ENEADECAGONO · HEPTADECAGONO · HEXADECAGONO · PENTADECAGONO · TETRADECAGONO

fr (9) : HEXADECAGONE · PENTADECAGONAL · PENTADECAGONALE · PENTADECAGONALES · PENTADECAGONAUX · PENTADECAGONE · PENTADECAGONES

it (1) : EPTADECAGONO

pt (2) : PENTADECAGONAIS · PENTADECAGONO

... ADECAGO ... (22 elements)

EPTADECAGONO · HEPTADECAGONO · PENTADECAGONAIS · PENTADECAGONAL · PENTADECAGONALE · PENTADECAGONALES · PENTADECAGONAUX · PENTADECAGONE · PENTADECAGONES · PENTADECAGONO

... DECAGON ... (88 elements)

DECAGON · DECAGONO · DECAGONOCARPUS · DODECAGONO · ENDECAGONO · HENDECAGONO · ISODECAGONO · OCTODECAGONO · TRIDECAGONO · TRISCAIDECAGONO

... ADECAGONA ... (6 elements)

PENTADECAGONAIS · PENTADECAGONAL · PENTADECAGONALE · PENTADECAGONALES · PENTADECAGONAUX

... ADECAGONE ... (4 elements)

HEXADECAGONE · PENTADECAGONE · PENTADECAGONES

... ADECAGONO ... (7 elements)

ENEADECAGONO · EPTADECAGONO · HEPTADECAGONO · HEXADECAGONO · PENTADECAGONO

... EADECAGON ... (2 elements)

ENEADECAGONO · ENNEADECAGON

... RADECAGON ... (1 element)

TETRADECAGONO

... TADECAGON ... (16 elements)

EPTADECAGONO · HEPTADECAGONO · PENTADECAGON · PENTADECAGONAIS · PENTADECAGONAL

... XADECAGON ... (3 elements)

HEXADECAGON · HEXADECAGONE · HEXADECAGONO