energetic
indefatigable
inexhaustible
tireless
unflagging
untiring
constructional
dark-matter
false-hearted
fatherly
filial
glass-faced
half-contemptuous
ingenerable
knockabout
lover-like
maundering
monster-stomping
persevering
programing
unabating
unintermitted
unremitting
unsleeping
unwearied
well-applied
well-meant