well grounded 
adjective
1Based on good evidence or reasons: her fears were well grounded...
- On another campaign promise, that of aid to cities, his position is similarly well grounded.
- So the assumption is psychologically well grounded.
- There is need to work out well grounded, multi-faceted and sustainable long-term measures on how to handle and manage drought situations.
2Having a good training in or knowledge of a subject: boys who are well grounded in traditional academic subjects...
- Carry on snapping I say, having checked this out with our photographers, who are pretty well grounded in the law of what can or cannot be photographed.
- In the field of science I'm a novice, but I'm well grounded in cow care.
- This wasn't just an argument of extremists, it was an argument of many people who were well grounded in biology.
- supererogant
- supererogate
- supererogating
- supererogation
- supererogation man
- supererogative
- supererogator
- supererogatorian
- supererogatorily
- supererogatory
- super-eruption
- superessence
- superessential
- superessentially
- superessive
- superette
- superexalt
- superexaltation
- superexalted
- superexcel
- superexcellence
- superexcellency
- superexcellent
- superexchange
- superexist