---
title: "Create one-way synonym"
method: POST
path: "/v2/one_way_synonyms/{parent_phrase}"
tags: ["Synonyms"]
---

# Create one-way synonym

`POST /v2/one_way_synonyms/{parent_phrase}`

## Request

- Base URL: `https://ac.cnstrc.com`
- URL: `https://ac.cnstrc.com/v2/one_way_synonyms/{parent_phrase}`
- Auth: one of:
  - HTTP basic
  - HTTP bearer

**🔐 This endpoint requires [HTTP authentication](https://docs.constructor.com/reference/main-authentication) (either [Basic](https://docs.constructor.com/reference/main-authentication#basic-authentication) or [Bearer](https://docs.constructor.com/reference/main-authentication#bearer-authentication)).**
For authenticating with Bearer token, required scopes are: `synonyms(w)`.

Create one-way synonym with specified `parent_phrase`.

## Path parameters

- `parent_phrase` string, required

## Query parameters

- `key` string, required: The key of the index to use.
- `c` string: The ID of the client and version that the request is coming from, such as `cio-js-2.90`.

## Request body

- OneWaySynonymV2PostRequestBody
  - `child_phrases` Phrase[], required
    - `phrase` string, required

## Response `204`

No Content

## Other responses

- `400`: Validation Error
- `401`: Credentials are not passed or action is forbidden.
- `403`: The supplied token does not have the required permissions.
- `409`: Conflict
- `429`: Rate limit breached

---

[API](https://skmtc.dev/constructor/apis/configuration.md) - [All operations](https://skmtc.dev/constructor/apis/configuration/llms.txt) - [OpenAPI document](https://skmtc.dev/constructor/apis/configuration/revisions/205ffdb5f494?raw)