General Union:
* योग (yoga) - This is the most common and general word for union, often referring to the union of the individual soul with the divine or the union of body, mind, and spirit.
* संयोग (samyoga) - This word refers to a general state of being together or connected.
* मेल (mel) - This word signifies the act of coming together or blending.
Specific Unions:
* विवाह (vivaha) - This word specifically refers to marriage or the union of a man and a woman.
* संघ (sangha) - This word refers to a group or association of people united for a common purpose.
* संगम (sangama) - This word signifies the meeting point or confluence of two rivers, but can also be used metaphorically for the union of two things.
Other related words:
* एकता (ekata) - This word signifies unity or oneness.
* अभेद (abheda) - This word refers to the state of being non-dualistic or inseparable.
The most appropriate word for "union" depends on the context and the specific meaning you want to convey.