同文网《英语词缀词根大全》以中高考及四六级考试大纲要求掌握的词汇为主，通过拓展同义前缀、同义后缀和同义词根，共收录了905个前缀、后缀及例句和练习题，可帮助读者了解单词的构词规律，是一部小型但内容丰富、功能实用的精编语言工具书。
| secut, sequ |
semin |
sen |
sens, sent |
sens, sent |
| serr |
sert |
serv |
set |
sever |
| sid |
sight |
sign |
simil, simul, sembl |
simil, simul, sembl |
| simil, simul, sembl |
sinu |
sist |
soci |
sol |
| sol |
solv, solu, solut |
solv, solu, solut |
solv, solu, solut |
som |
| somn |
son |
soph |
sort |
speci |
| spect, spic |
spect, spic |
sper |
spers |
spin |
| spir |
splend |
spond, spons |
spond, spons |
st, sta, stat, stan, stant, stin |
| st, sta, stat, stan, stant, stin |
st, sta, stat, stan, stant, stin |
st, sta, stat, stan, stant, stin |
st, sta, stat, stan, stant, stin |
st, sta, stat, stan, stant, stin |
| stall |
stell |
stigm |
still |
sting, stinct, stimul |
| sting, stinct, stimul |
sting, stinct, stimul |
stitut, stit |
stitut, stit |
strain, strict, string |
| strain, strict, string |
strain, strict, string |
strat |
struct |
sult |