くも・蜘蛛kumo[1]atamadaka (head-high)

1. nounspider
   大おおきな蜘蛛くもが巣すを作つくっていた。↗

   A big spider was spinning a web.

• SynonymスパイダーNeutralLoanword for a spider; also means a web crawler or the Spider solitaire game. For the animal in everyday speech, 「クモ」 is the natural choice.
• Related細蟹ささがにWritten「ささがに」 is an archaic, poetic name for a spider or spider silk, seen in classical verse such as waka; virtually never used in everyday modern Japanese.

Use 「蜘蛛（クモ）」 for the animal in everyday speech. 「スパイダー」 covers loanword uses such as web crawlers and the Spider card game, while 「ささがに」 is an archaic, poetic term met mainly in classical poetry.

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

1. くもの漢語かんご表現ひょうげん。スパイダー。