I’ll just point out that if one is inept or unlucky at defusing, one may be instantly and colorfully diffused. At which point you’re diffuse. Past-tense too, but mostly diffuse. 
wonder: (v.) to doubt or ponder
wander: to move without purpose; to stray
I wonder whether the cat has wandered away.
principle: (n.) a guiding belief of morality or law of nature
principle: (v.) to endow with moral principles
principal (n.) (1) the head of a school or (2) a sum of money on which interest is paid or charged
principal: (adj.) foremost, most important
The school’s unprincipled principal is the principal suspect in the embezzlement of the school’s interest and principal, an act that violates every principle of common decency.
Here’s one I just found, that I myself had mixed up:
forward — in the front, or towards the front
foreword — prefatory comments at the beginning of a book
froward — contrary, difficult to deal with
roll: what a ball does
rôle: what an actor plays
This brings me to “if” and “whether.”
“If” is supposed to be for conditional statements: “if it rains, [then] I’ll use my umbrella.”
“Whether” is supposed to be used in statements that present two possible alternative states: “it’s not clear whether he’s coming to the party.”
“Whether” can’t be used in place of “if”. In casual conversation, “if” is sometimes used in place of “whether” - “it’s not clear if he’s coming to the party” - but doing so adds an element of ambiguity, as there are sometimes conditional statements that present the outcome first: “I’m not going to the party if he’s going.” You can usually understand what’s being said based on context, but I hate it when professional writers (e.g. journalists) use “if” in place of “whether.”
defecting: abandoning or turning against; ceasing or changing one’s loyalty, especially from a military organisation or political party.
defecating: excreting feces from one’s bowels.
course - a direction or route taken or to be taken; the path, route, or channel along which anything moves.
coarse - composed of relatively large parts or particles; lacking in fineness or delicacy of texture, structure, etc.:
cause - a person or thing that acts, happens, or exists in such a way that some specific thing happens as a result; the producer of an effect; the reason or motive for some human action:
I blame the blunder on spell-check…and that my corn fritters were burning in my air-flyer.
…er, air fryer.
Coors - watery beer
Coors Lite - beery water
quash: to defeat or suppress; in a legal context, to void a previous ruling
squash: (v.) to crush or squeeze
glutinous: sticky
glutenous: containing gluten
gluttonous: greedy, eating to excess
gluteus: any of several muscles of the buttocks
Glutinous rice is not glutenous, but if you’re gluttonous with it, your gluteus muscles won’t be able to hold up your fat ass any more.
After which you’ll have a glut of poundage globbing up your works.
parley: to confer or negotiate, especially with one’s antagonist
parlay: to wager the winnings of one bet on a later bet
From the French of course. And via Old French, related to both parliament and parlor, ultimately deriving from the Latin “to speak”.
boogie: a style of blues music
bogey: a hostile supernatural creature
bogie - a cart, or a modular subassembly of wheels and axles
boggy - full of bogs or marshes
Bogie - an actor.
bogey - a not real good score on one hole of golf.
bogey - a sales or financial performance target.
bogey - military: an aerial target not yet conclusively identified as friend or foe.
Baggie - A noxious style of clothing.
Biggie - A now deceased rap performer.
booger - a piece of dried nasal mucous