VOMA (Vertical Online Market Analysis)
From Wiki
VOMA means "Vertical Online Market Analysis" in Theme Zoom speak- and refers to the function of the Theme Zoom Krakken natural language processing technology and capabilities.
In Krakken’s VOMA module the keyword list is filtered heavily so that only markets and market segments of the seed term are returned. Keywords which have few competing pages, very little traffic or no cost are filtered out because we require the keyword meet the definition of “market” or “market segment”. This is why Krakken cannot be classed as a “keyword research tool”. It is a market analysis and market research tool.
Please Also See How to Choose a Good Keyword Tool
Also See Theme Zoom