calf-like the baby cow or ur leg muscle.
laugh
Half
No.
half
That very much depends on where you come from as regional and national pronunciation vary hugely. Some possible words that rhyme with "staff" include "half", "calf" and "laugh". Partial (or almost-rhymes) include "path" and "bath".
calf, giraffe, staff, and laugh
Laugh, Staff, Giraffe, Graph
Nomads almost rhymes.
Homage almost rhymes.
zoo rymes with poo
It rhymes with math, laugh, and path.
Humboldt almost rhymes with unbolt.