• ibtesting,
• kbtesting,
• lbtesting,
• pbtesting,
• 0btesting,
• 9btesting,
• ovtesting,
• ontesting,
• ohtesting,
• ogtesting,
• obresting,
• obfesting,
• obgesting,
• obyesting,
• ob6esting,
• ob5esting,
• obtwsting,
• obtssting,
• obtdsting,
• obtrsting

• Infesting,
• nesting,
• Unresting,
• protesting,
• Resting,
• Abstaining,
• Digesting,
• testing.

The adverb form of "obtesting" is "obtestingly".

The adjective form of the word "obtesting" would be "obtesting". However, the word "obtesting" is not commonly used as an adjective. It is more commonly used as a verb.