Search Result for "well-grounded": 
Wordnet 3.0

ADJECTIVE (1)

1. logically valid;
- Example: "a sound argument"
[syn: reasoned, sound, well-grounded]



WordNet (r) 3.0 (2006):

well-grounded
    adj 1: logically valid; "a sound argument" [syn: reasoned,
           sound, well-grounded]