一晩一発 #類義語

増える 【ふえる】 vs 増やす【ふやす】 vs 増す【ます】
increase

増える (itr) and 増やす (tr) are used for increase of mass, volume, quantity, etc.. It cannot be used for level, speed, degree, etc.

貯金が増えました
My savings have increased

貯金を増やした
I increased my savings

増す (itr/tr) can substitute 増える and 増やす, and it can be used for level, speed, degree too.

速度が増した
The speed increased

速度を増した
I increased the speed

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予防【よぼう】 vs 防止【ぼうし】 - prevention

A great example where you can guess the distinction from the kanji:

防 protect
予 beforehand
止 stop

予防 = beforehand protection = precaution. It means preventing sth from happening, like a vaccination (予防接種).
防止 = protect and stop = mitigation; confinement; preventing a bad situation from getting worse, like a fire from spreading.

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やっと vs とうとう vs ついに - finally

The adverb やっと means, that something desireable has been achieved by a process of gradual changes.

とうとう means, that somehing expected has happend spontanously. The result is usually seen negative from the speakers perspective.

ついに can substitute both, but it can't be used if the outcome is the result of natural process:
冬が終わって、ついに暖かくなりました。❌
冬が終わって、やっと暖かくなりました。🟢

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制作【せいさく】
production (film, book)

製作【せいさく】
production (of goods); manufacturing

Film production (えいがせいさく) can be written with both kanji, but the meaning is slightly different. While 映画制作 only refers to the filming, 映画製作 means the whole process from planning, over filming, to marketing and release.

製造【せいぞう】 has a similar meaning like 製作, but it refers to large goods such as cars, boats (see 作る/造る).

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発達 vs 発展, what's the difference? Both mean developpement.

発達 means sophistication, improvement, personal growth. It's from the POV of the subject, that's why it's used also for diseases, eg. "ガンが発達する"

発展 is more like expansion (経済発展 - economic growth) or change (事件に発展する turn into an incident).

Used as suru verbs, both are intranstive.
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