御食い初め[okuizome] weaning ceremony
為初め[shisome] outset
為初める[shisomeru] to begin to do
仮初[karisome] temporary
業界初[gyoukaihatsu] the industry's first ...

月初め[tsukihajime] beginning of month
最初[saisho] beginning
初めに[hajimeni] to begin with (used as an introduction)
初めは[hajimeha] at first
手初めに[tehajimeni] at first

素袷[suawase] wearing a kimono (or awase) without any undergarments on
初袷[hatsuawase] the first time in the year that one wears an awase kimono

秋袷[akiawase] autumn lined kimono