“Double-faced” vs “double-headed.” [closed]

Solution 1:

Double-headed (adj):

1. (of a train) pulled by two locomotives.

Example: Trains were double headed for most of the day with every possible combination of locomotive.

2. (of a weapon) having two cutting implements, typically one at each end of the shaft.

Example: a double-headed axe. (Lexico)

Double-faced or two-faced (adj): 2. Tending to say one thing and do another; deceitful.

Example: were you double-faced—did you betray them?’

(Lexico)

You cannot interchange 'double-headed' and 'double-faced' to mean 'deceitful'. They have different meanings.

You can use 'duplicitous' or 'two-faced' instead of 'double-faced'.

Duplicitous (adj): deceitful. (Lexico)

Two-faced (adj): Insincere and deceitful. (Lexico)