timeserving vs opportunistic

timeserving and opportunistic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
timeserving	No	Yes	No	No
opportunistic	No	Yes	No	No

As adjectives, timeserving and opportunistic are synonyms defined as:

timeserving and opportunistic: taking immediate advantage, often unethically, of any circumstance of possible benefit

Other synonyms of timeserving include opportunist.

timeserving (adjective)	opportunistic (adjective)
taking immediate advantage, often unethically, of any circumstance of possible benefit	taking immediate advantage, often unethically, of any circumstance of possible benefit