• vietman,
• ietnam,
• vetnam,
• veitnam,
• vitnam,
• vietnames,
• vitenam,
• vietnem,
• vietmam,
• vietenam,
• viatnam,
• vietnamee,
• vientam,
• vietnan,
• vietname,
• vietnarm,
• vienam,
• viernam,
• vietanm,
• vitname

• Vitamin A2,
• vietnamese,
• Vitamin A1,
• vitamin a,
• vitamin g,
• vitamin d,
• vitamin b,
• vitaminise,
• vitamin k1,
• vitamin b2,
• vitamin k3,
• vitamine,
• Viet Nam,
• vitamin e,
• vitamin b6,
• vitamin m,
• vitamin k,
• vitamin h,
• Vitamin Bc,
• vitamin b1,
• vitamin,
• vitaminize,
• vitamin p,
• vitamin c.

The adjective form of the word "Vietnam" is "Vietnamese".

The plural form of "Vietnam" is "Vietnams".

The singular form of the word "Vietnam" remains the same, as it is already a singular noun.