class

[1]	classify , group , arrange , assort , type , categorize , rank , grade , rate , order
[2]	classify , sort , assort , sort out , separate

[1]	category , rank , grade , family , level , order , stratum , caste , lineage , birth , pedigree , stock , extraction , descent
[2]	category , form , grade , division , classification , course , group , genre , league , realm , domain , kind , sort , type
[3]	excellence , stratum , social class , merit , refinement , socio-economic class , elegance , prestige , importance , taste , discernment , distinction , bearing , presence , savoir faire , savoir vivre , breeding
[4]	year , course , course of study , form , (US) grade , course of instruction
[5]	division
[6]	year