irregular Antonyms

regular unimpeachable systematic symmetrical symmetric sure successional storey stock steady staunch standard stable spick tabular taffrail uniform unfailing undulatory typical typal trusty trustworthy true trodden timed tier taxonomic sound sonant smooth repeated reiterative regimentals rectilineal quotidian putty puritanic puristic proportional principled prescribed predictable representative reproachless sleek silky silken sericeous seriate