Making love.
slow and steady actually losses a race
slow, steady, regular, measured, slow but sure, plodding, ongoing, continuing
Equilibrium ,
Surplus?
Another word for the word unswerving is immovable, steady, steadfast, stable, unwavering, or firm.
romantic, sloppy, goshy
romantic affair
Your child's progress in math has been slow but steady.
I THINK ANOTHER WORD WOULD BE SWEET OR LOVING
compatible, consonant, steady, uniform.
"Moving out like a herd of turtles" is analogous to "a slow but steady start".
Adagio.