They both are antonyms of each other 'Mendacity' means untruthfulness, which is opposite in the same way 'Craven' means coward which is antonym of 'Courageous'.

A person who is 'Capricious ' loses 'Reliability' In the same way if a person is 'Tenacious ' he loses 'Practicality'.

'Water' contains 'Oxygen' in it and 'Salt' contains 'Sodium' in it.

'Geeta' and 'Quran' belong to the same class, i . e., religious books and 'Orange' and 'Mango' also belong to the same class, i. e., fruits.

'Sin ' is related to 'Crime' in the same way 'Morality' is related to 'Legality'.

'Cream' is made from 'Milk' Likewise, 'Pottery' is made from 'Clay'.

'Nest' is made up of 'Straws' and 'Cloth' is made up of 'Threads'.

'Loathe' and 'Coercion' are related,In the same way 'Irate' and 'Antagonism ' are related.

As 'Umpire' is in a 'Game' in the same way 'Legislator' is in an 'Election'.

'Sky' and 'Earth are related to one another, in the same manner as 'Fly' and 'Walk'.