1. Ten and three.

2. The number of ten and three.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• therteen,
• thirtee,
• thirtey,
• thirtie,
• thirthteen,
• thirtes,
• thireteen,
• thirten,
• thirteeen,
• thrtean,
• thirtheen,
• thrirteen,
• thierteen,
• thirteenat,
• thriteen,
• thurteen,
• theerteen,
• threteen,
• thinteen,
• thirtenn

• thirty-nine,
• threatened,
• threaten,
• thwarting,
• threatening,
• thirteenth,
• thorton,
• thirty-one.

The adjective form of the word "thirteen" is "thirteenth".

The plural form of the word "thirteen" is "thirteens"

The singular form of the word "thirteen" is "thirteen".