Synonyms: maintenance, sustainment, sustenance, upkeep.
Usage: In her heart, as in his, there gnawed ever an all-devouring hunger to work land of their own, a fervent aspiration to establish a solid basis of self-sustentation upon which their children might build.
shoal
Synonyms: school.
Usage: Every now and then a shoal of flying fish, scared from the water under the bows, would leap into the air, and fall the next moment like a shower of silver into the sea.