No . They are different . Possible synonym of work is Task .
A synonym for invisible is transparent. Opaque, and translucent may also work, depending on the sentence you use them in.
Manual work/labour is physical work done by people.
It is physical work and can be very strenuous. Some types of welding require hardly any effort.
Hard work
Work is mental or physical effort for something. Example: we have to work to get money.
The synonym for a physical map is map and or atlas
the synonym for work sheet is paper
A synonym for this word is work.
Synonym - well-being. Antonym - illness.
A synonym for this word is work.
the synonym for cooperate is to work together