Seven-letter words - change zero to two letters to make a new word (Part 1)

cistern

sternly

liberty

trebles

bleater

theater

retreat

berated

breasts

barista

artiste

starter

regatta

attract

tractor

reactor

:bomb:

creator :latin_cross: :star_and_crescent: :star_of_david: :orthodox_cross: :yin_yang: :wheel_of_dharma:

realtor :smiling_imp:

reality

smartly