1. (adjective) occurring or operating at the same time

• co-occurrent
• coincidental
• coinciding
• concurrent
• cooccurring
• simultaneous

1. (adjective) occurring or operating at the same time

• synchronal
• synchronic
• synchronous

2. (adjective) matching point for point

• congruent

1. (adjective) occurring or operating at the same time

• accompaniment
• attendant
• co-occurrence
• concomitant
• co-occur
• coincide
• cooccur
• co-occurrence
• co-occurrence
• co-occurrence
• coincidence
• coincidence
• coincidence
• concurrence
• concurrence
• concurrence
• conjunction
• conjunction
• conjunction
• coincide
• coincide
• concur
• concur
• simultaneity
• simultaneity
• simultaneousness
• simultaneousness

2. (adjective) matching point for point

• coincide
• coincidence