Correct

严密 vs 紧密(近义词)

/ Yánmì yus jǐnmì /
Strokes

Definition

tight,close/ close together,inseparable

Example

用法1
1)Both 严密 and 紧密 are adjectives meaning"to be very close together with no gap".严密 means"tight or thoughtful with no error",whereas 紧密 not only means"closeness between two things,but also continuity with no gap",e.g.:
2)Although 严密 and 紧密 are close in meaning,严密 stresses closeness with no gap,while 紧密 means"very intimate and inseparable";therefore,they are not interchangeable in most cases.
1
Píngkǒu
瓶口
fēng
de
hěn
yán
严密
  

The bottle is sealed tightly.

2
de
lùnwén
论文
jiégòu
结构
yán
严密
  
,
shuǐpíng
水平
hěn
gāo
  

His thesis has a good organization and high quality.

3
Zhǐhuīguān
指挥官
yán
严密
zhùshì
注视
zhāo
qiánxiàn
前线
de
zhànkuàng
战况
  

The commander is keeping a close eye on the battle of the front.