G5446–φυσικός–phusikos

For this reason God gave them up to vile lusts; for both their females changed the natural use into that contrary to nature;

φυσικὴν phusikēn “natural”

and in like manner the males also, leaving the natural use of the female, were inflamed in their lust towards one another; males with males working shame, and receiving in themselves the recompense of their error which was fit.

φυσικὴν phusikēn “natural”

But these, as natural animals without reason, made to be caught and destroyed, speaking injuriously in things they are ignorant of, shall also perish in their own corruption,

φυσικὰ phusika “as creatures of instinct”