Synonyms for Work at:

n.

forge, exert yourself, toil, overwork, buckle down, put your back into something, apply yourself, labor. attempt (noun)
try, endeavor.
work at (noun)
work on.

v.

flounder (verb)
toil, labor.
social (verb)
work on.

Other synonyms:

buckle down. toil. overwork, forge. labor. Other relevant words:
labor, toil, try.