hard
stated declare assert deliver affirm
Items, or events
Your question has a few words that use R (SCRABBLE, WORDS). There are other words like REDUVIID (a word I once played in a club), SIEROZEM, OURARIS, CRYINGLY, and so on.
ingenious. that is all i can think of. \\ interesting indecisive indifferent indistinct ill imitating irritating / irritatable / irritated irresistible intermediate infatuated idiot idiosyncratic individualist ignorant implosive just to name a few.
a or an
you can use or , otherwise, or rather than.
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Forefather?
athletics
spectacular
peter
hard
demonstrate, employ, illuminate,
You can use: manage and succeed.
pretty,sweet....