4
recess(noun, low, hole, corner, indentation)
2
centre
2
core
2
heart
2
secret place(noun, expression, break, hole, hollow)
1
ambush
1
angle
1
apse(noun, break, low, retreat, hole)
1
bay
1
bosom
1
break
1
carrel(noun, break, low, retreat, hole)
1
cavity(noun, break, retreat, opening, hole)
1
center
1
closet
1
corner
1
cove
1
cranny(noun, break, retreat, opening, hole)
1
crutch
1
crypt
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APASmart Define. (2015). penetralia thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/penetralia/thesaurus/synonyms
ChicagoSmart Define. 2015. "penetralia thesaurus" https://smartdefine.org/penetralia/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, penetralia thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/penetralia/thesaurus/synonyms>.
MLASmart Define. "penetralia thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/penetralia/thesaurus/synonyms>