We found one dictionary that defines the word landlockedness:

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1. landlockedness: Wiktionary

Definitions from Wiktionary (landlockedness) ▸ noun:  The quality of being landlocked. ▸ Words similar to landlockedness ▸ Usage examples for landlockedness ▸ Idioms related to landlockedness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing landlockedness ▸ Words that often appear near landlockedness ▸ Rhymes of landlockedness ▸ Invented words related to landlockedness