car-pool (n.)youdaoicibaDictYouDict
also carpool, 1942, American English, from car + pool (n.2). As a verb from 1962. Related: Carpooled; carpooling.
pool (v.1)youdaoicibaDictYouDict
"to make a common interest, put things into a pool," 1871, from pool (n.2). Related: Pooled; pooling.
spool (v.)youdaoicibaDictYouDict
c. 1600, from spool (n.). Related: Spooled; spooling; spooler (1550s).