G5446–φυσικός–phusikos

For this reason, God gave them up to vile passions. For their women changed the natural function into that which is against nature.

φυσικὴν phusikēn “natural”

Likewise also the men, leaving the natural function of the woman, burned in their lust toward one another, men doing what is inappropriate with men, and receiving in themselves the due penalty of their error.

φυσικὴν phusikēn “natural”

But these, as unreasoning creatures, born natural animals to be taken and destroyed, speaking evil in matters about which they are ignorant, will in their destroying surely be destroyed,

φυσικὰ phusika “as creatures of instinct”