シノニムshinonimu

1. noun, linguisticssynonym
2. noun, biologysynonym

• Synonym同義語どうぎごNeutralStresses that meanings are identical, as in 「同義語辞典」. More widely used than 「シノニム」 and free of any technical flavor.
• Synonym類義語るいぎごNeutralWords with similar, not necessarily identical, meanings; the usual term in schools and dictionaries. 「シノニム」 sounds more like linguistic jargon.
• Synonym同意語どういごNeutralCovers words with the same or nearly the same meaning and swaps freely with 「同義語」; 「シノニム」 is the more technical term.
• Related類語るいごNeutralBasically a shorter way to say 「類義語」; familiar from book titles like 「類語辞典」.
• AntonymアントニムNeutralThe opposite of 「シノニム」: a loanword for antonym, and just as technical. In everyday speech say 「対義語」 or 「反対語」.

In everyday use say 「同義語」 or 「類義語」; 「類語」 and 「同意語」 are fine too. 「シノニム」 is a technical term from linguistics; in taxonomy it means one taxon having several scientific names. Its opposite is 「アントニム」, but casually say 「対義語」.

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

1. 同義語どうぎご。類義語るいぎご。
2. 同一どういつの分類ぶんるい群ぐんに複数ふくすうの学名がくめいがあること。異名いみょうとも言ゆう。