Darshan is a sanskrit word. A person doing Darshan is daarshanik. if you mean darshan = seeing then it is drashta. (anyway darshan is a Hindi form of Sanskrit word darshanam = seeing,insight etc.)
In Sanskrit, 'prameya' is the word for algorithm.
Indigo is called "Nila" in Sanskrit.
In Sanskrit, jamun is called Jambu.
Clothes in Sanskrit are called "Vastra."
The Sanskrit word for wheat is "godhum."
VAYU is what you call air in sanskrit.
The word for LITCHI in Sanskrit is "Lichikā" or "Lichu".
Light in Sanskrit is called "प्रकाश" (prakāśa).
Sweet in Sanskrit is called "मधुर" (Madhura).
In Sanskrit, kite is called "patanga" or "chitrakarika."
In Sanskrit 'gem' is called 'ratnam(n)[ रत्नम्]'.
In Sanskrit 'oyster' is called 'shuktiH(f)[शुक्ति:]'