happenstance happenstance /ˈhæpənˌstæns/

noun

1. An event that might have been arranged although it was really accidental  ( happenstance , coincidence )
   an event that might have been arranged although it was really accidental
     It was a coincidence that they ran into each other at the airport.
   It was a coincidence that they ran into each other at the airport.
   
   

 astringent astringent /əˈstrɪndʒənt/

adjective

1. () Sour or bitter in taste  ( acerb , acerbic , astringent )
   sour or bitter in taste
   
2. Tending to draw together or constrict soft organic tissue  ( astringent )
   tending to draw together or constrict soft organic tissue
    Astringent cosmetic lotions
   astringent cosmetic lotions
   

noun

1. A drug that causes contraction of body tissues and canals  ( astringent , astringent drug , styptic )
   a drug that causes contraction of body tissues and canals
   
   

 cytologist cytologist /saɪˈtɒlədʒɪst/

noun

1. A biologist who studies the structure and function of cells  ( cytologist )
   a biologist who studies the structure and function of cells
    The cytologist examined cell samples to check for any abnormalities.
   The cytologist examined cell samples to check for any abnormalities.
   
   

 substation substation /ˈsʌbˌsteɪʃən/

noun

1. () A subsidiary station where electricity is transformed for distribution by a low-voltage network  ( substation )
   a subsidiary station where electricity is transformed for distribution by a low-voltage network
    The power outage was traced back to a malfunctioning substation.
   The power outage was traced back to a malfunctioning substation.