おばあちゃん・お婆ちゃん・お祖母ちゃんobaachan

1. noungranny; grandma; gran
2. nounold lady; old woman
   あの人ひとたちは私のことをおばあちゃんだと言ゆう。↗

   They say that I'm an old woman.

• SynonymおばあさんNeutralSlightly more formal than 「おばあちゃん」; also fine when talking to people outside the family.
• SynonymばあさんCasualColloquial and rather rough, sometimes disrespectful; husbands also use it for an elderly wife; less warm than 「おばあちゃん」.
• SynonymばあちゃんCasual「おばあちゃん」 with the 「お」 dropped — even more casual, mostly for one's own grandma, as in 「うちのばあちゃん」.
• Related祖母そぼNeutralPlain kinship term for one's own or anyone's grandmother; the usual way to mention your own grandma to outsiders, but not used as a direct address.
• RelatedおばあさまFormalHonorific for someone else's grandmother, as in 「おばあ様はお元気ですか」; formal and polite.
• AntonymおじいちゃんCasualColloquial and affectionate for a grandpa or an elderly man; the male counterpart of 「おばあちゃん」.

Everyday and affectionate, 「おばあちゃん」 is the default for your grandma or an old lady. Use 「祖母」 to mention your own grandmother to outsiders, and 「おばあ様」 to refer politely to someone else's.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 高齢こうれいの女性じょせい。また、祖母そぼ。