puritanical (adj.)

• abstinent
• anchoritic
• ascetic
• austere
• bigoted
• censorious
• choosy
• conscientious
• critical
• demure
• discriminating
• discriminative
• dogmatic
• dour
• eremitic
• evangelical
• exacting
• fastidious
• firm
• fundamentalist
• hard
• hidebound
• inexorable
• inflexible
• iron
• ironclad
• mendicant
• meticulous
• muscle-bound
• narrow
• obdurate
• obstinate
• old-maidish
• orthodox
• overmodest
• particular
• picky
• precise
• priggish
• prim
• procrustean
• prudish
• punctilious
• puritanic
• relentless
• rigid
• rigorous
• rockbound
• sanctimonious
• scrupulous
• selective
• self-denying
• sensitive
• smug
• staunch
• stiff
• stiff-necked
• straightlaced
• straitlaced
• strict
• stubborn
• stuffy
• unbending
• uncompromising
• unrelenting
• unyielding