Mawson, C.O.S., ed. (18701938). Rogets International Thesaurus. 1922.
Class I. Words Expressing Abstract Relations Section VI. Time
2. Relative Time
1. Time with reference to Succession
NOUN: SYNCHRONISM; coexistence, coincidence; simultaneousness &c. adj.; concurrence, concomitance, unity of time, interim.
[H AVING EQUAL TIMES] isochronism.
CONTEMPORARY, coeval, coetanian [ obs.].
VERB: COEXIST, concur, accompany, go hand in hand, keep pace with; synchronize, isochronize.
ADJECTIVE: SYNCHRONOUS, synchronal, synchronic or synchronical, synchronistic or synchronistical, simultaneous, coexisting, coincident, concomitant, concurrent; coeval, coevous [ obs.]; contemporary, contemporaneous; coetaneous [ rare], coinstantaneous, coterminous, collateral, coeternal; isochronous.
ADVERB: AT THE SAME TIME; simultaneously &c. adj.; together, in concert, during the same time; in the same breath; pari passu [ L.]; in the interim.
at the very moment [See Instantaneity]; just as, as soon as; meanwhile ( while) [See Time].