faculty
feature
fiancee
flaccid
foghorn
fractal
furtive
ammonia
violins
respect
failure
Renee
There are many 3 letter words ending in "re". a r e is are, which ends in re, and is a 3 letter word. there are many others.
reactsreaderreallyrealtyreaperrebaterebootrebornrebukerecallrecantrecentrecipereciterecordrectorredbudredeemreducerefersrefilerefinerefundregardregentregimeregionregretrehashrehirerejectrejoinrelaterelentremainremarkremedyremindremoverenderrenegerenownrentalrepaidrepairrepeatrepentrescueresistresumeretardretirerevoltrevealreviserewardrezone
revolve
redot
genre
re
re
Re
ray
On the off chance that you typed or counted incorrectly, that really wants to be "flourish." If it's really seven letters, re-submit your question and I'll stay out of it.