casual
phagocytocsis
Adagio.
Slowpoke
sluggish
No. Fo is not an acceptable Scrabble word.
Adagio means slow. another word for slow is lento.
bone idle
The word polka is Czech and means half-step. Another name for a slow polka is a slow half-step dance. The French polka is also slower in tempo.
Making love.
A synonym for slow is plodding, sluggish, or inactive.
The Official Scrabble Players Dictionary does not list fo as a legal Scrabble word.