strike vs thud

strike and thud both are nouns.

Word	Noun	Adjective	Verb	Adverb
strike	Yes	No	Yes	No
thud	Yes	No	Yes	No

As verbs, thud is a hyponym of strike; that is, thud is a word with a more specific, narrower meaning than strike:

strike (noun)	thud (noun)
a group's refusal to work in protest against low pay or bad work conditions	a heavy dull sound (as made by impact of heavy objects)
a score in tenpins: knocking down all ten with the first ball
an attack that is intended to seize or inflict damage on or destroy an objective
a conspicuous success
(baseball) a pitch that the batter swings at and misses, or that the batter hits into foul territory, or that the batter does not swing at but the umpire judges to be in the area over home plate and between the batter's knees and shoulders
a gentle blow

strike (verb)	thud (verb)
cause to form (an electric arc) between electrodes of an arc lamp	strike with a dull sound
arrive at after reckoning, deliberating, and weighing	make a dull sound
indicate (a certain time) by striking	make a noise typical of an engine lacking lubricants
make a strategic, offensive, assault against an enemy, opponent, or a target
deliver a sharp blow, as with the hand, fist, or weapon
hit against; come into sudden contact with
affect or afflict suddenly, usually adversely
produce by manipulating keys or strings of musical instruments
remove by erasing or crossing out or as if by drawing a line
pierce with force
smooth with a strickle
hook by a pull on the line
produce by ignition or a blow
form by stamping, punching, or printing
disassemble a temporary structure, such as a tent or a theatrical set
have an emotional or cognitive impact upon
drive something violently into a location
occupy or take on
cause to experience suddenly
find unexpectedly
stop work in order to press demands
attain
touch or seem as if touching visually or audibly