The crosswordbuddy tool can be used to find words that end with the same letters. This makes it a great source for lists of actions and adjectives that can be used to form 'Experiments in the day'.
To use crosswordbuddy you simply type the final letters of the word, select 'this is the end of the word' and then crosswordbuddy finds all the dictionary listings with that ending.
Actions: words ending with: ING
Adjectives: words ending with: ABLE, AL, AR, ED, ENT, ESQUE, FUL, ING, IBLE, IC, ICAL, ISH, IVE, LESS, LIKE, OUS, SOME, WORTHY, PROOF, EN, LY, Y