In order to fully answer this question, what words are you talking about? Or in what context are you using?
color - colour favorite - favourite gray - grey
"worlds" or "words?
There are about 450 Languages spoken in India and about 700 different Native American languages. But there is no such language as "Indian".
There are many examples of different words that mean the same thing. Some examples of different words that mean the same thing are warm and hot and cold and freezing.
Homograph: Words with the same spelling but different meanings, origins, or pronunciations. Homophone: Words that sound the same but have different meanings and often different spellings. Homonym: Words that are spelled and pronounced the same but have different meanings.
SAME.
Trio, triad, triple, threesome.
Humor, Labor, center, meter.
That depends on which tribe you mean. There were, and are, numerous native American languages, many with very different words for common things like family.
Synonyms
to move
devoted, loving