• eubiaceae,
• dubiaceae,
• fubiaceae,
• tubiaceae,
• 5ubiaceae,
• 4ubiaceae,
• rybiaceae,
• rhbiaceae,
• rjbiaceae,
• ribiaceae,
• r8biaceae,
• r7biaceae,
• ruviaceae,
• runiaceae,
• ruhiaceae,
• rugiaceae,
• rubuaceae,
• rubjaceae,
• rubkaceae,
• ruboaceae

• rudimentary,
• Rubin,
• Rubiform,
• rubella,
• rubens,
• rubicon,
• rubeola,
• Rubiginous,
• Rubidiculous,
• Rubidic,
• Rubio,
• rubric,
• Rubellite,
• rubidium,
• rubiconed.

The adjective form of the word "Rubiaceae" is "rubiaceous".

The plural form of "rubiaceae" is also "rubiaceae".

The singular form of the word "Rubiaceae" is "rubiaceae". Rubiaceae is the scientific name of a family of flowering plants, and it is used in both singular and plural forms.