• wthl,
• toc,
• tht,
• pithc,
• thwt,
• ehco,
• tthe,
• thtt,
• thno,
• thec,
• thinc,
• bithc,
• thg,
• thech,
• thoch,
• tha,
• thje,
• thic,
• touhc,
• thgh

• thies,
• THz,
• thug,
• thick,
• theca,
• thwack,
• thus,
• theis,
• These,
• This,
• thigh,
• thach,
• thuja,
• Thuss,
• theus,
• Those.

The plural form of the word "THC" is "THCs"

The singular form of the word "THC" is "THC" itself. "THC" stands for tetrahydrocannabinol, which is a chemical compound found in cannabis. It does not have a different singular form.