What is another word for on underside?
Pronunciation: [ˌɒn ˌʌndəsˈa͡ɪd] (IPA) 
The phrase "on underside" refers to the underside or lower part of something. Some synonyms for this phrase include "beneath," "below," "underneath," "under," "lower," "bottom," and "base." Each of these words has a slightly different nuance and usage, but all essentially refer to the same location. For example, "below" usually means something is directly under another object, while "underneath" implies a covering or layer. "Beneath" and "under" are more general terms that can refer to any position lower than something else. Whatever word you choose to use, it's important to accurately convey the location or position you are describing.
