Synonyms for Bottomless (same or very similar meaning)
WordNet sense 1 (having no limits in range or scope):
limitless, unlimitedWordNet sense 2 (having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a center; sometimes used in combination):
deepWordNet sense 3 (not wearing clothing):
unclothedFrom the ODE community, based on WordNetadd/edit