plural of Maunday coin

Two aspects of the same thing. / Two things that superficially appear to be opposites but are fundamentally similar.

(figuratively) To give tit for tat.

simple past tense and past participle of pay back in someone's own coin

present participle of pay back in someone's own coin

Third-person singular simple present indicative form of pay back in someone's own coin

The process of coining money. / (uncountable) Coins taken collectively; currency. / (uncountable, lexicography) The creation of new words, neologizing.

To occupy exactly the same space. / To occur at the same time. / To correspond, concur, or agree.

Occurring as or resulting from coincidence. / Happening or existing at the same time.

(mathematical analysis) Of two mappings, a point in the domain of both mappings that has same image under both.