1) Approbatory 2) Approving 3) Expressing approbation 4) Favorable 5) Favourable 6) Plausive 1) Approbatory 2) Approving 3) Favourable 4) Plausive 
In linguistics, approbatives are words or grammatical forms that denote a positive affect; that is, they express the appreciation or approval of the speaker. Sometimes a term may begin as a pejorative word and eventually be adopted in an approbative sense. In historical linguistics, this phenomenon is known as amelioration (e.g., `punk`). ...
• (a.) Approving, or implying approbation.
Ap'pro·ba·tive adjective [ Confer French approbatif .] Approving, or implying approbation. Milner. 
approbative, approbatory Approving; expressing approbation.
approving; expressing approbation.