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GET /v1/synonyms

Names & synonyms for a compound

Try it live

10 free calls per day — no sign-up, no API key. Goes through the oanor gateway.

Custom headers (optional)
api.oanor.com/chemistry-api

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Code snippets

curl "https://api.oanor.com/chemistry-api/v1/synonyms" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/chemistry-api/v1/synonyms", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/chemistry-api/v1/synonyms");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);
import requests
requests.get(
    "https://api.oanor.com/chemistry-api/v1/synonyms",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "cid": 2244,
        "count": 50,
        "input": {
            "name": "aspirin"
        },
        "total": 697,
        "synonyms": [
            "aspirin",
            "ACETYLSALICYLIC ACID",
            "50-78-2",
            "2-Acetoxybenzoic acid",
            "2-(Acetyloxy)benzoic acid",
            "Acylpyrin",
            "O-Acetylsalicylic acid",
            "o-Acetoxybenzoic acid",
            "Acenterine",
            "Acetophen",
            "Ecotrin",
            "Salicylic acid acetate",
            "Aceticyl",
            "Acetosalin",
            "Polopiryna",
            "Aspirdrops",
            "Pharmacin",
            "Premaspin",
            "Salcetogen",
            "Acetonyl",
            "Benaspir",
            "Empirin",
            "Endydol",
            "Measurin",
            "Rhodine",
            "Saletin",
            "Temperal",
            "Adiro",
            "Ecolen",
            "Acetosalic acid",
            "Rheumintabletten",
            "Solprin acid",
            "o-Carboxyphenyl acetate",
            "Acidum acetylsalicylicum",
            "2-acetyloxybenzoic acid",
            "Enterosarine",
            "Acetisal",
            "Acetylsal",
            "Aspirine",
            "Bialpirina",
            "Bialpirinia",
            "Entericin",
            "Enterophen",
            "Globentyl",
            "Salacetin",
            "Solpyron",
            "Acesal",
            "Acisal",
            "Asagran",
            "Asteric"
        ]
    },
    "meta": {
        "timestamp": "2026-05-31T07:34:16.250Z",
        "request_id": "7e23b99c-1fb7-43dc-abeb-d8a34d2c7be8"
    },
    "status": "ok",
    "message": "Synonyms retrieved",
    "success": true
}