TFS REST API : fetch the allowed values/lookUp values for the given field

I found following two API which return the field information at collection or project level

API 1:

https://<accountname>.visualstudio.com/DefaultCollection/_apis/wit/fields?api-version=1.0

 [List the collection level all fields information (included field name, reference Name, type, read Only, supported Operation]

API 2:

https://<accoutname>.visualstudio.com/DefaultCollection/<project name>/_apis/wit/workItemTypes/Bug?api-version=1.0

[List the field information for the given project and work item type (included the field always Required, name, reference name, URL)]

I want to know is there any REST API available which list the possible allowed values for the given field,None of above API response included the allowed values (look up values) for the field such as priority, severity etc.

Kindly let me know whether allowed values Rest API available or not. if yes, provide the information about such API.

Thanks in advance.