Luxuriant, lush (7)
I believe the answer is:
profuse
I believe this is a double definition.
'luxuriant' is the first definition.
(I know that luxuriant can be written as profuse)
'lush' is the second definition.
(I know that lush can be written as profuse)
(Other definitions for profuse that I've seen before include "Plentiful, luxuriant" , "Lavish or extravagant, could be gratitude or apology" , "Copious" , "Lavish or plentiful, say praise" , "Plentiful, generous" .)