us_f_l
c_r_f_l
careful
j_ _f_l
joyful
q_ _c_ly
quickly
q_ _et_y
quietly
w_rt_le_s
worthless
us_l_s_
useless
f_n_i_s_t
funniest
f _ _rf_l
fearful
h_p_i_s_
happiest
f_s_es_
fastest
s_ _w_y
slowly
c_r_l_s_
careless
f _ _rl_s_
fearless
s_a_t_r
smarter