• msit,
• srim,
• saime,
• simm,
• aio,
• zim,
• qim,
• aom,
• eim,
• aiz,
• etm,
• awm,
• bih,
• btm,
• vam,
• ciu,
• cik,
• swm,
• cym,
• dkim

• sine,
• sinai,
• sinha,
• sinn,
• Sina,
• sima,
• sian,
• sin,
• sinew,
• SIME,
• siam,
• sion,
• siwan,
• sium,
• SIMO.

The adjective form of the word "Sim" is "simulated".

The plural form of the word "Sim" is "Sims"

The singular form of the word "Sim" is "Sim". In English, some nouns do not have different forms for singular and plural. These nouns are called "uninflected" or "non-countable" nouns. "Sim" is one of those words.