Open English Wordnet
Nouns
(n)understanding, apprehension, discernment, savvythe cognitive condition of someone who understands“he has virtually no understanding of social cause and effect”
(n)agreement, understandingthe statement (oral or written) of an exchange of promises“they had an agreement that they would not interfere in each other's business”, “there was an understanding between management and the workers”
(n)sympathy, understandingan inclination to support or be loyal to or to agree with an opinion“his sympathies were always with the underdog”, “I knew I could count on his understanding”
(n)reason, understanding, intellectthe capacity for rational thought or inference or discrimination“we are told that man is endowed with reason and capable of distinguishing good from evil”
Adjectives
(s)understandingcharacterized by understanding based on comprehension and discernment and empathy“an understanding friend”