S: (adj) average, fair, mediocre, middling (lacking exceptional quality or ability) "a novel of average merit"; "only a fair performance of the sonata"; "in fair health"; "the caliber of the students has gone from mediocre to above average"; "the performance was middling at best"
S: (adj) mediocre (poor to middling in quality) "there have been good and mediocre and bad artists"
W: (adj) good [Indirect via bad] (having desirable or positive qualities especially those suitable for a thing specified) "good news from the hospital"; "a good report card"; "when she was good she was very very good"; "a good knife is one good for cutting"; "this stump will make a good picnic table"; "a good check"; "a good joke"; "a good exterior paint"; "a good secretary"; "a good dress for the office"