Erstwhile and Time was

Erstwhile adjective - Having been such at some previous time.

Time was and erstwhile are semantically related In some cases you can use "Time was" instead the word "Erstwhile" as an adverb or an adjective.

Erstwhile and time was are semantically related in earlier topic. Sometimes you can use "Erstwhile" instead the phrase "Time was" as an adjective or an adverb, if it concerns topics such as olden, in the past, previously in time or order.