The word is lair.
Lair
aerie
lair
lair
Lair
lair
"lair" might work.
lair
Look, that is a lions Lair. Welcome to my small lair .
One seven letter word, One two letter word and a five letter word, One three letter word and a four letter word, One three letter word and two two letter words, Two three letter words, Three two letter words, A two letter word and a four letter word, A six letter word, A two letter word and a three letter word, A five letter word, Two two letter words, A four letter word, A three letter word, or A two letter word.
The word lair has several synonyms, but no antonym for it exists.