The state or quality of being companionable.(noun)
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Use "companionableness" in a sentence
"William Howitt was always ready to lend an attentive and unbiassed ear to the newest theory, or even the newest fad, while Mary possessed in the fullest degree the gift of companionableness, and her inexhaustible sympathy drew from others an instant confidence."
"Their freedom, their energy, their companionableness, was so different from women of the East."
"There was another and quieter side in which he showed his rare companionableness and endeared himself to many people."