Correct

忠诚 vs 忠实

/ zhōngchéng vs zhōngshí /
Strokes

Definition

忠诚 and 忠实 both are Adjectives, which means [loyal; faithful; true], indicates "genuine and sincere".

Example

忠诚 stresses the sense of being faithful to the country, people, undertaking, friends; 忠实 stresses being faithful, reliable, and whole-hearted.
1
guàn
一贯
zhōngchéng
忠诚
lǎoshi
老实
  

He is loyal and honest all the time.

2
司法
guān
机关
yìng
zhōngchéng
忠诚
xíng
履行
guójiā
国家
rénmín
人民
赋予
de
quán
权力
  

The legitimate department should enforce the power bestowed by the people loyally.

3
Zài
jǐnyàoguāntóu
紧要关头
  
,
biǎoxiàn
表现
de
fēicháng
非常
zhōngchéng
忠诚
  
(
zhōngshí
忠实
  
)
  

He was very loyal at its crucial stage.

4
men
我们
xiàozhǎng
校长
duì
jiào
教育
shì
事业
de
zhōngchéng
忠诚
shì
yǒugòng
有目共睹
de
  

Everyone knows that our principal is devoted to the education cause.

5
duì
妻子
fēicháng
非常
zhōngshí
忠实
  

He is very loyal to his wife.

6
de
祖父
shì
zhōngshí
忠实
de
jiào
佛教
xìn
信徒
  

His grandfather is the faithful believer of the Buddhism.

忠实 also means "true and real".
7
Zhè
piān
xiǎoshuō
小说
zhōngshí
忠实
fǎnyìng
反映
le
jiǔshí
九十
niándài
年代
zhōngguó
中国
nóngcūn
农村
shēng
发生
de
巨大
biànhuà
变化
  

The novel is an authentic account of the great changes taking place in the countryside in 1990s.

8
gōngjìncuì
鞠躬尽瘁
  
,
érhòu
死而后已
  
,
zhèngshì
正是
zhè
wèi
lǎo
jiàngjūn
将军
shēng
一生
de
zhōngshí
忠实
xiězhào
写照
  

The general's whole life indicated the spirit of “giving one's best till one's death, working with devotion".

忠诚 and 忠实 both can take a complement introduced by 于; the two words are not interchangeable.
If 忠诚 in example ③ is replaced by 忠实, the meaning is different, with the former meaning staunch, while the latter meaning loyal.
9
Zuòwéi
作为
míng
rénmín
人民
jiàoshī
教师
  
,
men
我们
yào
zhōngchéng
忠诚
jiào
教育
shì
事业
  

As a teacher for the people, we should be devoted to the education cause.

10
Fān
翻译
zuòpǐn
作品
必须
zhōngshí
忠实
yuánwén
原文
  
,
不可
biān
胡编
luàn
zào
  

A translation should be faithful to the original, but not free from the original.

Related

忠诚忠实