One obscure name for water is H2O, which is the chemical formula for water, one hydrogen molecule and two oxygen molecules. This name is as popular in the mainstream lexicon as it is in scientific circles.
Another name for water is aqua, which is a Spanish word. The word isn't as popular as the word water itself, however it is a fairly popular way to say water.
I would give it an obscure name that no one living in the UK/USA could pronounce, meaning they'd need to change the name to something different. Otherwise, give it your name + a normalic ending, -dium as an example.
name the acid which increases the density of water
Dihydrogen monoxide is the scientific name for water but isn't used a lot
Water vapour
Seltzer Water is another name for Carbonated Water. So its Carbon.
Totally obscure question
Jolanta is a variant of the Spanish name Yolanda which is of obscure etymology.
The name of the tactic to obscure ideas and ferment discourse is called constitutionalism. Constitutionalism is also the complex of ideas, attitudes, and patterns of behavior.
The accepted scientific name is Erinnyis obscura.
The accepted scientific name is Panoquina panoquinoides.
"Cleaning the house is a mundane task that I try to do regularly."
This is a hard question to answer. You might say "Water Polo" or something obscure, but as soon as you could name an obscure sport someone else could invent a new one that would be completely unknown. "Least popular professional sport" might be something easier to qualify.
Delta Theta Gamma
Yes! It's not completely obscure, but it is memorable.
Wow! you do go for the obscure- it"s a Spanish name, Mariposa. It literally means Butterfly.
of Obscure
obscure means dark