• xoreopsis tinctoria,
• voreopsis tinctoria,
• foreopsis tinctoria,
• doreopsis tinctoria,
• cireopsis tinctoria,
• ckreopsis tinctoria,
• clreopsis tinctoria,
• cpreopsis tinctoria,
• c0reopsis tinctoria,
• c9reopsis tinctoria,
• coeeopsis tinctoria,
• codeopsis tinctoria,
• cofeopsis tinctoria,
• coteopsis tinctoria,
• co5eopsis tinctoria,
• co4eopsis tinctoria,
• corwopsis tinctoria,
• corsopsis tinctoria,
• cordopsis tinctoria,
• corropsis tinctoria

The adjective form of the word "coreopsis tinctoria" is "coreopsis tinctoria".

The plural form of "Coreopsis Tinctoria" is "Coreopsis Tinctoria." This is because "Coreopsis Tinctoria" is the scientific name of a specific plant species, which does not change in its plural form.

The singular form of the word "Coreopsis Tinctoria" remains the same. "Coreopsis Tinctoria" is the scientific name or binomial name for a species of flowering plant commonly known as the Plains Coreopsis or Golden Tickseed. The scientific name does not change whether it is singular or plural.